Imaging Comet 2I/Borisov = C/2019 Q4 (Borisov) on 2019 10 08 from MPC H06

There has been a good bit of buzz over a comet known as 2I/Borisov = C/2019 Q4 (Borisov). Given the fact that it is the second known interstellar object to make its way through our Solar System would explain much of this buzz. If there is buzz if the object is in range of the telescopes if there are open time slots, and the weather helps out, more often than not, I am going to give it a try.  With 2I/Borisov being low in the predawn sky, I had to wait for to be at an altitude at which the telescope could take the images.  I set up the plan to image 2I/Borisov when it was at an altitude of 27 degrees(minimum target altitude: for T11 is approx 20 degrees). I had the telescope started imaging about a half-hour before the end of full darkness. I had T11 take 15 - 60-second luminance BIN2 images.

Comet 2I/Borisov imaged from
New Mexico Skies, Mayhill, New Mexico, USA(MPC H06)
on 2019-10-08 using  itelescope.net's T11(0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer),
 a  stack of 15 - 60-second luminance BIN2 images.
 By Steven M. Tilley  

Background 

Gennadiy Vladimirovich Borisov, a Russian amateur astronomer, has discovered the first known interstellar comet, 2I/Borisov. Discovered at MARGO (Gennadiy Borisov's observatory) in the Republic of Crimea on Aug 30, 2019. This object was reported to the Minor Planet Center as a "comet candidate" using the observer-assigned temporary designations gb00234. This object was posted to the NEOCP/PCCP, confirmation page, and observations poured in from around the World. On Sep 11, 2019, MPEC 2019-R106 : COMET C/2019 Q4 (Borisov) was issued, which stated the possibility and the need for more observations. MPEC 2019-S72 : 2I/Borisov = C/2019 Q4 (Borisov) was issued on Sep 24, 2019. This MPEC stated confirmation of its "hyperbolic orbit and interstellar origin" and "assigned the permanent interstellar designation 2I."

See

• MPEC 2019-R106 : COMET C/2019 Q4 (Borisov)
• MPEC 2019-R113 : COMET C/2019 Q4 (Borisov)
• MPEC 2019-S03 : COMET C/2019 Q4 (Borisov)
• MPEC 2019-S09 : COMET C/2019 Q4 (Borisov)
• MPEC 2019-S25 : COMET C/2019 Q4 (Borisov)
• MPEC 2019-S62 : COMET C/2019 Q4 (Borisov)
• MPEC 2019-S72 : 2I/Borisov = C/2019 Q4 (Borisov)
• MPEC 2019-S120 : COMET 2I/Borisov
• MPEC 2019-T44 : COMET 2I/Borisov 
• MPEC 2019-T116 : COMET 2I/Borisov 
• "Pseudo-MPEC" for 0002I
• A Second Interstellar Object Has Almost Certainly Been Found In Our Solar System
• MPC Database: 2I/Borisov = C/2019 Q4 (Borisov) 
• Newly Discovered Comet Is Likely Interstellar Visitor (JPL press release)
• The Maybe Comet From Another Star: Now zinging through Cancer: a glob of light from interstellar space ?
• "Naming of New Interstellar Visitor: 2I/Borisov" (IAU Press release)
• Astronomers May Have Found an Interstellar Comet. Here's Why That Matters.
• Interstellar comet C/2019 Q4 (Borisov) by  Piotr Guzik1, Michał Drahus1 Krzysztof Rusek , Wacław Waniak , Giacomo Cannizzaro, Inés Pastor-Marazuela
• Another Interstellar Visitor Is Headed Our Way
• FAQ for gb00234 = C/2019 Q4 = 2I (Borisov) [ by Bill Gray at ProjectPluto]
• JPL Small-Body Database Browser: C/2019 Q4 (Borisov)
• 2I/Borisov (From Wikipedia, the free encyclopedia) 

Confirmation Images Of The NEOCP(NEO Confirmation Page) Object (A10aElq = 2002 XQ90) on 2018-12-13

The NEO 2002 XQ90 first observed at an apparent magnitude of 17.4 by Lincoln Laboratory ETS, New Mexico(MPC Code 704) on 2002-12-15, ten days after it made a approaches of 11.50 Lunar Distances (0.02954 Astronomical Units). This asteroid was observed until 2003-01-12 when it became too faint to be observed. On 2018-12-09 ATLAS-MLO(Asteroid Terrestrial-impact Last Alert System - Mauna Loa) on its nightly sweep of the nigh sky found an object at an apparent magnitude of an apparent magnitude of 19.1. Observations of this object were reported to the Minor Planet Center(MPC) using the observer-assigned temporary designation A10aElq. The object was posted the NEO Confirmation Page. Observer from around world submitted confirmation observations to the MPC.  In an effort to help in the confirmation I obtain 60-10 Second Luminance BIN2 taken using iTelescope.net's(T11).

I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 4 sets(stacks) of 14 images. 

A confirmation image of the NEOCP(NEO Confirmation Page) object (A10aElq = 2002 XQ90)
on 2018-12-13 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
a stack of 14-10 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

A confirmation image of the NEOCP(NEO Confirmation Page) object (A10aElq = 2002 XQ90)
on 2018-12-13 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
a stack of 14-10 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

A confirmation image of the NEOCP(NEO Confirmation Page) object (A10aElq = 2002 XQ90)
on 2018-12-13 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
a stack of 14-10 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

A confirmation image of the NEOCP(NEO Confirmation Page) object (A10aElq = 2002 XQ90)
on 2018-12-13 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06)
a stack of 14-10 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

I submitted my observations to the Minor Planet Center(MPC).
On 2018-12-16 the MPC issued MPEC 2018-Y02 : 2002 XQ90 and identify the A10aElq as 2002 XQ90.

2002 XQ90 Earth Close Approaches (JPL)

Close-Approach (CA) Date and Time (TDB)	±		Time Uncertainty	CA Distance Nominal (LD)	CA Distance Nominal (au)	CA Distance Minimum (LD)	CA Distance Minimum (au)
1903-10-01 14:09	±		00:02	24.91	0.06401	24.91	0.06401
1919-09-21 01:49	±	<	00:01	21.14	0.05433	21.14	0.05433
1935-09-09 11:52	±	<	00:01	42.43	0.10902	42.43	0.10902
1986-12-18 06:01	±	<	00:01	44.06	0.1132	44.05	0.1132
2002-12-05 01:14	±	<	00:01	11.5	0.02954	11.5	0.02954
2018-12-11 01:08	±	<	00:01	18.03	0.04633	18.03	0.04633
2079-09-25 12:59	±	<	00:01	22.64	0.05818	22.64	0.05818
2095-11-07 20:06	±		00:03	29.34	0.07538	29.33	0.07538
2111-11-29 13:51	±		00:02	16.73	0.04298	16.72	0.04297
2127-12-07 00:16	±	<	00:01	9.98	0.02565	9.98	0.02565
2143-12-23 11:58	±		00:04	55.32	0.14216	55.31	0.14213
2188-09-08 17:20	±		00:06	65.3	0.1678	65.28	0.16775

Also see:

• MPEC 2002-Y19 : 2002 XQ90
• The Tracking News - Earth's Busy Neighborhood(Sunday, 16 December 2018)
• NEODyS-2 (2002 XQ90)
• MPEC Index(Project Pluto)
• M.P.E.C. statistics

Comet 21P/Giacobini-Zinner on 2018-09-14 from Mayhill, New Mexico

Comet 21P/Giacobini-Zinner on 2018-09-14 from Mayhill, New Mexico [New Mexico Skies](MPC Code H06) 60-30 second luminance BIN2 images taken with iTelescope.net's (T11)

Credits

The targeting information was obtained from the
The Minor Planet Center (MPC)
http://www.minorplanetcenter.net/

The images where taken with iTelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)Mayhill, New Mexico [New Mexico Skies](MPC Code H06)

http://iTelescope.Net/

The observations were made in support of the PACA_21/GZ campaign

https://www.facebook.com/ThePACAProject/

Image blinking and 1st stacked image was done with CCDStack2


http://www.ccdware.com/

Data reduction, the stacked images, and the object verification windows was done with Astrometrica

http://www.astrometrica.at/

The data was examine with the help of
Find_Orb Orbit determination software - Project Pluto

http://www.projectpluto.com/find_orb.htm

Music: Good Starts by Jingle Punks from YouTube Audio Library
https://www.youtube.com/watch?v=NstTz8iyl-c

(c) Steven M. Tilley

http://lagniappeobserving.com

More Follow-up Observations of 2018 RQ1

The NEO(Aten) 2018 RQ1 (approximate diameters 39 m - 88 m [127.953 foot - 288.7139 foot]) was first observed by the Catalina Sky Survey on 2018-09-07. As of 2018-09-10 2018 RQ1 as a data-arc span of 72.77 hr with 44 published observations. 2018 RQ1 is listed on the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.(as of 2018-09-10) In an effort to help with the improvement of the known orbit I booked imaging runs on iTelescope.net's T11 and T24 of 60-30 second luminance BIN2 images each.

I was able to obtain 20 images from T11. I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 3 sets(stacks) of 6 images. Each image was shifted match the movement of 2018 RQ1.

An image of the NEO 2018 RQ1

on 2018-09-10

from Mayhill, New Mexico

[New Mexico Skies](MPC Code H06)

a stack of 6-30 second luminance BIN2 images

taken with iTelescope.net's (T11)

By Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-10 
from Mayhill, New Mexico 
[New Mexico Skies](MPC Code H06) 
a stack of 6-30 second luminance BIN2 images
taken with iTelescope.net's (T11) 
By Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-10 
from Mayhill, New Mexico 
[New Mexico Skies](MPC Code H06) 
a stack of 6-30 second luminance BIN2 images
taken with iTelescope.net's (T11) 
By Steven M. Tilley

I was able to obtain 49 images from T24. I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 3 sets(stacks) of 14 images. I had work around the meridian flip.

An image of the NEO 2018 RQ1
on 2018-09-10 
from Sierra Remote Observatory, Auberry, California (MPC U69) 
a stack of 14-30 second luminance BIN2 images 
taken with iTelescope.net's (T24) 
By Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-10 
from Sierra Remote Observatory, Auberry, California (MPC U69) 
a stack of 14-30 second luminance BIN2 images 
taken with iTelescope.net's (T24) 
By Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-10 
from Sierra Remote Observatory, Auberry, California (MPC U69) 
a stack of 14-30 second luminance BIN2 images 
taken with iTelescope.net's (T24) 
By Steven M. Tilley

see
Accessible NEA(Object/Trajectory Details for 2018 RQ1)

Helping With The Confirmation of the Mars-crossing Asteroid 2018 PO23

On 2018-08-13 I check the NEO Confirmation Page(NEOCP) and  an object clalled ZTF00Th.

Orbit diagram for 2018 PO23
(view 1)
2018-08-13 12:35 UTC
Earth Distance: 0.723 au
Sun Distance: 1.691 au
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018PO23

Orbit diagram for 2018 PO23
(view 2)
2018-08-13 12:35 UTC
Earth Distance: 0.723 au
Sun Distance: 1.691 au
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018PO23

Orbit diagram for 2018 PO23
(view 3)
2018-08-13 12:35 UTC
Earth Distance: 0.723 au
Sun Distance: 1.691 au
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018PO23

I was able to obtain a  set of  4-60 second luminance BIN2 images taken with iTelescope.net's (T30) and a set 12-60 second luminance BIN2 images taken with iTelescope.net's (T30). I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 3 sets(stacks) of 3 images.  Each image was shifted match movement of ZTF00Th.

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-13 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 4-60 second luminance BIN2 images
taken with iTelescope.net's (T30)
Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-13 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 4-60 second luminance BIN2 images
taken with iTelescope.net's (T30)
By Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-13 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 4-60 second luminance BIN2 images
taken with iTelescope.net's (T30)
Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-13 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 4-60 second luminance BIN2 images
taken with iTelescope.net's (T30)
By Steven M. Tilley

Then I  submitted this batch of  4 observation to the Minor Planet Center.
About 14 hours later I  obtain a  set of  60-60 second luminance BIN2 images taken with iTelescope.net's(T11) I had Astrometrica stack 3 stacks of 15 images ( note a star keep me from having  4 stacks of 15 images)
 

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-14 from from Mayhill,
New Mexico [New Mexico Skies](MPC Code H06)
 a stack of 15-60 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-14 from from Mayhill,
New Mexico [New Mexico Skies](MPC Code H06)
 a stack of 15-60 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-14 from from Mayhill,
New Mexico [New Mexico Skies](MPC Code H06)
 a stack of 15-60 second luminance BIN2 images
taken with iTelescope.net's (T11)
By Steven M. Tilley

Then I  submitted this batch of  3 observation to the Minor Planet Center.
After another ten  hours I  obtain a  set of  60-60 second luminance BIN2 images taken with iTelescope.net's(T17) I had Astrometrica stack 3 stacks of 15 images ( note the first 9 images where on the "wrong" side of the meridian flip)

 A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-14 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 15-60 second luminance BIN2 images
taken with iTelescope.net's (T17)
By Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-14 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 15-60 second luminance BIN2 images
taken with iTelescope.net's (T17)
By Steven M. Tilley

A confirmation image of the Mars-crossing Asteroid 2018 PO23
on 2018-08-14 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 15-60 second luminance BIN2 images
taken with iTelescope.net's (T17)
By Steven M. Tilley

Then I  submitted this batch of 3  observation to the Minor Planet Center.

After 110 observations,  collectively made from 27 observatories from around the world, at Aug. 16.90, 2018 the Minor Planet Center gave  ZTF00Th. the provisional designation 2018 PO23 and removed it form the NEOCP.

Confirmation Images of The NEO 2017 MC

A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 5-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06),
a stack of 50-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T11 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 20-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 20-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 20-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

A confirmation images of the NEO 2017 MC on 2017-06-18
from Siding Spring Observatory, Coonabarabran, NSW, Australia (MPC Code Q62),
a stack of 60-30 Second Luminance BIN2 Images taken with itelescope.net's
(TEL T31 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M. Tilley

Background

(as of 2017-06-18)

• Object: 2017 MC
• Approximate Diameter:  150 m - 380 m ( 492.126 feet to feet 1246.72)(Absolute Magnitude: H= 21.021)
• Orbit Type: Apollo [NEO] Potentially Hazardous Asteroid
• On the Sentry Risk Table: NO
• On the NEODyS CLOMON2 risk page: NO
• Discovery (First) observation was made: 2017 06 16.53663
• Discovery (First )observation was made by:  ATLAS-MLO(Asteroid Terrestrial-impact Last Alert System)(MPC Code  T08) The Discovery M.P.E.C.: MPEC 2017-M15 : 2017 MC
• Last Observation(publish) was made: 2017 06 18.64005 (by iTelescope Observatory, Siding Spring   (MPC Code Q62 )
• Data-Arc Span(publish) :  2 days
• Number of Optical Observations(published) : 76 
• Observatories Reporting (Published) Observations(MPC Code):
• (104) San Marcello Pistoiese, Italy.
• (160) Castelmartini, Italy.
• (204) Schiaparelli Observatory, Italy.
• (595) Farra d'Isonzo, Italy.
• (926) Tenagra II Observatory, Nogales, US/Arizona.
• (B49) Paus Observatory, Sabadell, Spain.
• (B74) Santa Maria de Montmagastrell, Spain.
• (C23) Olmen,Belgium.
• (H06) iTelescope Observatory, Mayhill, US/New Mexico.
• (I93) St Pardon de Conques (N44.558708 W0.203000) France.
• (J69) North Observatory, Clanfield (N50.939011 W1.019700) UK.
• (J95) Great Shefford,UK.
• (K38) M57 Observatory, Saltrio, Italy.
• (K63) G. Pascoli Observatory, Castelvecchio Pascoli, Italy.
• (K88) GINOP-KHK, Piszkesteto, Hungary.
• (Q62) iTelescope Observatory, Siding Spring, Australia/NSW.
• (T08) ATLAS-MLO, Mauna Loa,US/Hawaii.
• (W25) RMS Observatory, Cincinnati,US/Ohio.
• (W34) Squirrel Valley Observatory, Columbus, US/North Carolina.
• (Y00) SONEAR Observatory, Oliveira, Brazil.

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico

See The NEO 2016 WJ1 Has Been Removed from the Sentry Risk Table--Neodys Risk Table List 3 Possible Impacts 2106-2115.

Background

(as of 2016-12-06 ) 

• Object: 2016 WJ1
• Approximate Diameter: 140 m - 320 m (459.318 feet to 1049.87 feet)(Absolute Magnitude: H= 21.375)
• Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
• On the Sentry Risk Table: No Removed on 2016-12-02 21:33
• On the NEODyS CLOMON2 risk page: yes 
•  NOTE this is NOT a prediction of an impact but rather a statement there is insufficient observational data rule out an impact -- for information read  Understanding Risk Pages by Jon Giorgini
• Torino Scale(NEODyS CLOMON2): 0
• The likelihood of a collision is zero, or is so low as to be effectively zero. Also applies to small objects such as meteors and bodies that burn up in the atmosphere as well as infrequent meteorite falls that rarely cause damage."
• First(Precovery) Observation was made: 2003 07 04.605261
• First(Precovery) Observed By: Mauna Kea (MPC Code 568) The Precovery M.P.E.C.:MPEC 2016-X21 : 2016 WJ1
• Discovery (First) observation was made: 2016 11 19.46522
• Discovery (First )observation by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
• Last Observation(publish): 2016 12 06.14946 (by iTelescope Observatory (MPC Code H06)
• Data-Arc Span(publish) : 4904 days (13.43 yr)
• Number of Optical Observations(published): 305
• Observatories Reporting (Published) Observations(MPC Code):
• (046) Klet Observatory, Ceske Budejovice, Czech Republic.
• (151) Eschenberg Observatory, Winterthur, Switzerland.
• (160) Castelmartini, Italy.
• (203) GiaGa Observatory, Italy.
• (246) Klet Observatory-KLENOT, Czech Republic.
• (291) LPL/Spacewatch II, US/Arizona.
• (568) Mauna Kea, US/Hawaii.
• (691) Steward Observatory, Kitt Peak-Spacewatch, US/Arizona.
• (926) Tenagra II Observatory, Nogales, US/Arizona.
• (958) Observatoire de Dax, France.
• (A17) Guidestar Observatory, Weinheim, Germany.
• (A48) Povegliano Veronese, Italy.
• (C47) Nonndorf,  Austria.
• (C77) Bernezzo Observatory, Italy.
• (E10) Siding Spring-Faulkes Telescope South, Australia/NSW
• (F51) Pan-STARRS 1, Haleakala, US/Hawaii.   Observers
• (G96) Mt. Lemmon Survey, US/Arizona.
• (H06) iTelescope Observatory, Mayhill, US/New Mexico.
• (H21) Astronomical Research Observatory, Westfield, US/Illinois.
• (H45) Arkansas Sky Obs., Petit Jean Mountain South, US/Arkansas.
• (I52) Steward Observatory, Mt. Lemmon Station, US/Arizona.
• (J04) ESA Optical Ground Station, Tenerife, Canary Islands (Spain).
• (J69) North Observatory, Clanfield, UK.
• (K38) M57 Observatory, Saltrio, Italy.
• (K61) Rokycany Observatory, Czech Republic.
• (K65) Cesena, Italy.
• (K74) Muensterschwarzach Observatory, Schwarzach, Germany.
• (K88) GINOP-KHK, Piszkesteto, Hungary.
• (L04) ROASTERR-1 Observatory, Cluj-Napoca, Romania..
• (Q62) iTelescope Observatory, Siding Spring, Australia/NSW.
• (T05) ATLAS-HKO, Haleakala, US/Hawaii.
• (T12) Mauna Kea-UH/Tholen N EO Follow-Up (2.24-m), US/Hawaii.
• (W25) RMS Observatory, Cincinnati, US/Ohio.
• (W88) Slooh.com Chile Observatory, La Dehesa, Chile.
• (Y28) OASI, Nova Itacuruba, Brazil.
• (Z80) Northolt Branch Observatory, UK.
• Perihelion Distance: 0.6654428334671134 (AU)
• Aphelion Distance: 2.013952383212332 (AU)
• Earth MOID: 0.000339353 AU (0.132(LD)) or 31,544.832 miles (50,766.486 (KM))
• Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.0538126242900806 (AU) (20.942(LD)) or 5,002,195.932 miles (8,050,254.01(KM))

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 4-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 26-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-12-06 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 10-30 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

 A screenshot of Find_Orb showing elements and their uncertainty

A screenshot of Find_Orb showing orbital elements and uncertainty 
with all published observation.(as of 2016-12-06 )
(2 observationobservation are rejected as outliers)  

Orbital elements:  2016 WJ1
   Perihelion 2017 Feb 7.484174 +/- 7.58e-5 TT = 11:37:12 (JD 2457791.984174)
Epoch 2017 Feb 16.0 TT = JDT 2457800.5   Earth MOID: 0.0004   Ve: 0.0024
M   5.41278301 +/- 0.000047         Ma: 0.0027                Find_Orb
n   0.63561452635 +/- 9.48e-8       Peri.   87.67640929 +/- 0.00013
a   1.33969778679 +/- 1.33e-7       Node    82.05225737 +/- 0.00009
e   0.5032876307 +/- 6.78e-7        Incl.    2.88944962 +/- 0.000015
P   1.55/566.37d           H 21.3   G  0.15   U  1.9  
q 0.66544446179 +/- 9.73e-7    Q 2.01395111179 +/- 7.16e-7
303 of 305 observations 2003 July 4-2016 Dec. 6; mean residual 0".31

Useful Links:

• Space Situational Awareness(ESA) -- 2016 WJ1
• Near Earth Objects Dynamic Site--2016 WJ1
• (MPC) Observations --2016 WJ1
• JPL Orbit Diagram --2016 WJ1 
• PHA 2016 WJ1 from M57( An Amateur Astrophotography Blog)
• Asteroid 2016 WJ1: to what extent is a threat?(in Italian a with translated to option)
• NEO Earth Close Approaches (JPL) (up coming)
• JPL's NEO Earth Close-Approaches  (Between 1900 A.D. and 2200 A.D- limited to encounters with  reasonably low uncertainty)
• The Tracking News
• NEO Coordination Centre 
• Speed of Light - Space - Distance Calculator
• Asteroid Hazards: The View from Space(MPC)
• Don’t fear apocalyptic asteroids: you’re safer than you think
• Understanding Risk Pages By Jon Giorgini
• Revised asteroid scale aids understanding of impact risk
• Near Earth Objects Scale Helps Risk Communication
• Dealing With the Impact Hazard: An International Project
• The Palermo Technical Impact Hazard Scale
• An Asteroid as Entered the Blogosphere… Should I Be Worried? A commentary by Steven M. Tilley
• International Asteroid Warning Network 
• Impact Risk Assessment: An Introduction - Near-Earth Object Program
• Hazardous NEO Technical Reviews
• Frequently Asked Questions For Impact Risk Assessment 
• How to Find an Impact Orbit for the Earth-Asteroid Collision
• The Asteroid/Comet Impact Hazard
• Whom should we call? Data policy for immediate impactors announcements
• NEO Search & Follow-Up
• NEOs' Science pages  by Livia Giacomini
• Torino Scale(JPL) 
• Find_Orb --- Orbit determination software - Project Pluto
• Guide to Minor Body Astrometry(MPC)

The NEO 2016 WJ1 on 2016-11-28 from Mayhill, New Mexico

See The NEO 2016 WJ1 Has Been Removed from the Sentry Risk Table--Neodys Risk Table List 3 Possible Impacts 2106-2115.

NOTE with only 8 days data-arc span there is "little" known about the NEO 2016 WJ1 and the information in this post may become outdated. So one should always check the links for updates. Whenever an object is posted to one the risk lists (especially if it has a Torino Scale 1 or greater) and it is observable, observers will take a particular interest in it. In the coming days it is possible there will be more follow-up observations and a search in archives for precovery observations. It is MOST likely this object will be removed from the risk lists. It could take observations over one or more orbital periods before we can reliably say where it will be from 2030 to 2108.

Background
(as of 2016-11-27) 

• Object: 2016 WJ1 
• Approximate Diameter: 140  m - 320  m (459.318 feet to 1049.87 feet)(Absolute Magnitude: H= 21.345)
• Orbit Type: Apollo [NEO]- Potentially Hazardous Asteroid
• On the Sentry Risk Table: yes  NO
•  NOTE this is NOT a prediction of an impact but rather a statement there is insufficient observational data rule out an impact -- for information read  Understanding Risk Pages by Jon Giorgini
•  Torino Scale(JPL): 1 
• "A routine discovery in which a pass near the Earth is predicted that poses no unusual level of danger. Current calculations show the chance of collision is extremely unlikely with no cause for public attention or public concern. New telescopic observations very likely will lead to re-assignment to Level 0"
• On the NEODyS CLOMON2 risk page: yes
• Torino Scale(NEODyS CLOMON2): 1
• First observation was made: 2016 11 19.46522
• First observed by: Mt. Lemmon Survey (MPC Code G96) The Discovery M.P.E.C.: MPEC 2016-W38 : 2016 WJ1
• Last Observation(publish): 2016 11 27.09769 (by Cesena, Italy  (MPC Code K65)
• Data-Arc Span(publish) : 8 days
• Number of Optical Observations(published): 108
• Observatories Reporting (Published) Observations(MPC Code):
•  (246) Klet Observatory-KLENOT, Czech Republic. 
• (291) LPL/Spacewatch II, Arizona,US. 
• (691) Steward Observatory, Kitt Peak-Spacewatch,Arizona,US.
• (926) Tenagra II Observatory, Nogales,Arizona,US. 
• (958) Observatoire de Dax France.
• (G96) Mt. Lemmon Survey ,Arizona,US. 
• (H06) iTelescope Observatory, Mayhill,New Mexico,US.
• (H21) Astronomical Research Observatory,Westfield,Illinois,US.
• (I52) Steward Observatory, Mt. Lemmon Station,Arizona,US. 
• (J04) ESA Optical Ground Station, Tenerife, Canary Islands (Spain).
• (J69) North Observatory, Clanfield, UK.
• (K38) M57 Observatory, Saltrio, Italy.
• (K65) Cesena, Italy.
• (K88) GINOP-KHK, Piszkesteto, Hungary.
• (L04) ROASTERR-1 Observatory, Cluj-Napoca, Romania.
• (Q62) iTelescope Observatory, Siding Spring,NSW,Australia.
• (T12) Mauna Kea-UH/Tholen NEO Follow-U, Hawaii,US.
• (Y28) OASI, Nova Itacuruba, Brazil.
• (Z80) Northolt Branch Observatory,UK.
• Perihelion Distance: 0.6643867240093884  (AU)
• Aphelion Distance: 2.019109835427547 (AU)
• Earth MOID: 0.00035665 AU (0.139 (LD)) or 33,152.689 miles (53,354.081 (KM))
• Close-Approach to Earth: Will safely pass Earth on 2016-December-16 at a Nominal Distance of  0.0539800537140701 (AU) (21.007 (LD)) or 5,017,759.469 miles (8,075,301.095 (KM))

The NEO 2016 WJ1 on 2016-11-28 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 5- 60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-11-28 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 5- 60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-11-28 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 5- 60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-11-28 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 5- 60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

The NEO 2016 WJ1 on 2016-11-28 from Mayhill, New Mexico (New Mexico Skies) (MPC Code H06)
a stack of 45- 60 Second Luminance BIN2 Images taken with iTelescope.net's
(T11 TEL 0.50-m f/6.8 reflector + CCD + f/4.5 focal reducer)
(c) Steven M.Tilley

Useful Links: 

• Space Situational Awareness(ESA) -- 2016 WJ1
• Near Earth Objects Dynamic Site--2016 WJ1
• (MPC) Observations --2016 WJ1
• JPL Orbit Diagram --2016 WJ1
• NEO Earth Close Approaches (JPL) (up coming)
• JPL's NEO Earth Close-Approaches  (Between 1900 A.D. and 2200 A.D- limited to encounters with  reasonably low uncertainty)
• The Tracking News
• NEO Coordination Centre 
• Speed of Light - Space - Distance Calculator
• Asteroid Hazards: The View from Space(MPC)
• Don’t fear apocalyptic asteroids: you’re safer than you think
• Understanding Risk Pages By Jon Giorgini
• Revised asteroid scale aids understanding of impact risk
• Near Earth Objects Scale Helps Risk Communication
• Dealing With the Impact Hazard: An International Project
• The Palermo Technical Impact Hazard Scale
• An Asteroid as Entered the Blogosphere… Should I Be Worried? A commentary by Steven M. Tilley
• International Asteroid Warning Network 
• Impact Risk Assessment: An Introduction - Near-Earth Object Program
• Hazardous NEO Technical Reviews
• Frequently Asked Questions For Impact Risk Assessment 
• How to Find an Impact Orbit for the Earth-Asteroid Collision
• The Asteroid/Comet Impact Hazard
• Whom should we call? Data policy for immediate impactors announcements