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Jan 17, 2017

A NEO Re-Confirmation for the Asteroid 2016 VM4

The asteroid 2016 VM4 on 2017-01-15 from
Sierra Remote Observatory. Auberry California USA ( MPC U69)
a stack of 30-120 Second Luminance BIN1 Images
 taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-15 from 
Sierra Remote Observatory. Auberry California USA ( MPC U69) 
a stack of 5-120 Second Luminance BIN1 Images
 taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-15 from 
Sierra Remote Observatory. Auberry California USA ( MPC U69) 
a stack of 5-120 Second Luminance BIN1 Images
 taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-15 from 
Sierra Remote Observatory. Auberry California USA ( MPC U69) 
a stack of 5-120 Second Luminance BIN1 Images
 taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-15 from 
Sierra Remote Observatory. Auberry California USA ( MPC U69) 
a stack of 5-120 Second Luminance BIN1 Images
 taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-15 from 
Sierra Remote Observatory. Auberry California USA ( MPC U69) 
a stack of 5-120 Second Luminance BIN1 Images
 taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-16 from
Sierra Remote Observatory. Auberry California USA ( MPC U69)
 a stack of 12-120 Second Luminance BIN2 Images
taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-16 from
Sierra Remote Observatory. Auberry California USA ( MPC U69)
 a stack of 3-120 Second Luminance BIN2 Images
taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
-- sometimes stars get in the way--
By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-16 from
Sierra Remote Observatory. Auberry California USA ( MPC U69)
 a stack of 3-120 Second Luminance BIN2 Images
taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley

The asteroid 2016 VM4 on 2017-01-16 from
Sierra Remote Observatory. Auberry California USA ( MPC U69)
a stack of 3-120 Second Luminance BIN2 Images
taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
The asteroid 2016 VM4 on 2017-01-16 from 
Sierra Remote Observatory. Auberry California USA ( MPC U69) 
a stack of 3-120 Second Luminance BIN2 Images 
taken with iTelescope.net's (TEL T24 0.61-m f/6.5 reflector + CCD)
 By Steven M. Tilley
When seeking out imaging targets I often check the NEO Confirmation Page for an object that is not too faint,  not too fast, not too close to a bright moon, and not too much uncertainty.  This weekend found one and observed it for two nights. With the observations from observers from around the world along with my observations the MPC match to the known asteroid 2016 VM4 (this is not unusual.  2016 VM4 had previously been only observed for 3 days in November of 2016 and had a poorly defined orbit. 

The Asteroid 2012 TC4 is Making a Safe Close-Approach on October-12-2017 Please Stand By For a Media Storm

The First in a Series
This artist's concept shows a broken-up asteroid.
ImageCourtesy NASA/JPL-Caltech 
On October 12, 2017, the asteroid 2012 TC4 is projected to make an exceptionally close approach to Earth, and it is possible that the media (alternative, mainstream,  print, broadcast, and social) will go wild. Writeups will range from well written to poorly written, originally written to carbon copies, well research to poorly research, well intentioned to bad intentioned, and so forth. How is the consumer of media to make heads or tails of the hodgepodge of choices out there? The author plans a series of posts to give some background on 2012 TC4 in particular, some general knowledge about asteroids, their orbit, asteroid observing, asteroid risk list, and source information, to help the read navigate the mishmash of media out there.

What makes the Close-Approach on October 12, 2017, exceptional?

If we count 2008 TC3 and 2014 AA(both were small and impacted the Earth and would tie for first) 2012 TC4 could come in as the sixth closest known approach to date.  While there is some uncertainty about how close the close-approach will be, there is sufficient observational data to rule out an impact on October 12, 2017, When talking about astronomical distances it can be tough to wrap one's head around this can lead one to use of analogies such as close shave which is not aways helpful. If one uses a basketball to serve as a model for the Earth it may be easier to grasp.

Note some of this infomation is outdated See:The Asteroid 2012 TC4 Has Been Recovered

The Model  (the Basketball Size Earth) 

  • Earth (Equatorial) radius: 4.2634965e-5 AU 3963.17 miles (6378.1 KM) - for the model 4.69507082121091 inches (11.93 CM)
  • Earth (Equatorial) Circumference(assuming around Earth): 0.000267883358316 AU 24,901.32 miles (40,074.78 KM) -for the model 29.5 inches (74.93 CM)
  • ISS(Perigee): 2.67383e-6 AU 248.55 miles (400.00 KM) -for the model 0.29 inches ( 0.75CM)
  • ISS(apogee): 2.7407e-6 AU 254.76 miles (400.00 KM) -for the model 0.3 inches ( 0.77CM)
  • Geosynchronous orbit: 0.00023921463 AU (0.093 Lunar Distance (LD)) or 22236.39 miles (35786.00 KM)  -for the model (after subtracting the radius)- 2.2 feet ( 0.67 M)
  • Lunar Distance (LD): 0.003 AU or 238606.54  22236.39 miles (35786.00 KM)  -for the model (after subtracting the radius)-  23.16 feet (7.06 M)
  • Astronomical Unit: 389.171 Lunar Distance (LD) or 9.296e+7 miles (1.496e+8 KM)   -for the model   1.7 miles  (2.7 KM)

Background
(as of 2017-01-16 ) 


  • Object: 2012 TC4
  • Orbit Type: Apollo [NEO]
  • Approximate Diameter: 15 m - 33 m (  49.2126 feet to 108.268  feet)(Absolute Magnitude: H= 26.7)
  • On the Sentry Risk Table:  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.."
  • On the NEODyS CLOMON2 risk page: Yes
    • NEODyS Recovery Campaign: 2017-08-31t o 2017-10-24
  • Discovery observation was made: 2012 10 04.467661
  • Discovery observation was made by Pan-STARRS 1 (MPC Code F51) The Discovery M.P.E.C.: MPEC 2012-T18 : 2012 TC4
  • Last Observation (publish): 2012 10 11.74842   (by Volkssternwarte Drebach, Schoenbrunn(MPC code 113))
  • Data-Arc Span (publish): 7 days
  • Number of Optical Observations(published):301
  • Observatories Reporting (Published) Observations(MPC Code):
    • (089) Nikolaev,  Ukraine.
    • (104) San Marcello Pistoiese, Italy.
    • (113) Volkssternwarte Drebach, Schoenbrunn, Germany.
    • (204) Schiaparelli Observatory, Italy
    • (291) LPL/Spacewatch II, US/Arizona.
    • (300) Bisei Spaceguard Center-BATTeRS, Japan.
    • (461) University of Szeged, Piszkesteto Stn (Konkoly), Hungary.
    • (470) Ceccano, Italy.
    • (568) Mauna Kea, US/Hawaii.
    • (695) Kitt Peak, US/Arizona.
    • (703) Catalina Sky Survey, US/Arizona.
    • (716) Palmer Divide Observatory, Colorado Springs, US/Colorado.
    • (718) Tooele, US/Utah.  
    • (857) Iowa Robotic Observatory, Sonoita, US/Arizona.
    • (900) Moriyama, Japan.
    • (932) John J. McCarthy Obs., New Milford,  US/Connecticut.
    • (B04) OAVdA, Saint-Barthelemy, Italy. 
    • (B88) Bigmuskie Observatory, Mombercelli, Italy.
    • (C32) Ka-Dar Observatory, TAU Station, Nizhny Arkhyz, Russia.
    • (C77) Bernezzo Observatory, Italy.
    • (E10) Siding Spring-Faulkes Telescope South, Australia/NSW.
    • (F51) Pan-STARRS 1, Haleakala, US/Hawaii
    • (F65) Haleakala-Faulkes Telescope North, US/Hawaii.
    • (G40) Slooh.com Canary Islands Observatory, Canary Islands (Spain).
    • (G48) Doc Greiner Research Obs., Rancho Hildalgo,  US/New Mexico.
    • (H06) iTelescope Observatory, Mayhill, US/New Mexico.  
    • (H17) Angel Peaks Observatory, US/Colorado.
    • (H21) Astronomical Research Observatory, Westfield, US/Illinois.
    • (H36) Sandlot Observatory, Scranton, US/Kansas
    • (J16) An Carraig Observatory, Loughinisland, UK.
    • (J84) South Observatory, Clanfield, UK.
    • (J95) Great Shefford, UK.
  • Perihelion Distance: 0.9337184081730526(AU)
  • Aphelion Distance: 1.877515914032821
  • Goldstone Asteroid Schedule: Yes  2017 Oct ( Needs Astrometry: Yes Physical Ob
  • Near-Earth Object Human Space Flight Accessible Targets Study (NHATS): Yes
Useful Links:

Jan 12, 2017

The Earth Got Buzz by the Asteroid 2017 AG13 -- 50% Closer Than The Moon


Artist's concept of a near-Earth object. ImageCourtesy NASA/JPL-Caltech
On  2017 Jan  7  at  7:39:30.24(UTC) the Catalina Sky Survey discovered an asteroid on route to buzz the Earth. They submit their observations to the Minor Planet Center(MPC) and the "object"(with their observations) was posted the NEO Confirmation Page.  Observers from around from the world took follow-up observations and on 2017 Jan  8 at 15:14(UTC) the Minor Planet Electronic Circular announcing the discovery. On 2017 Jan  9 at  ~12:49 (UTC) buzz the Earth at ~  0.5 Lunar Distances (LD) -- to put things in perspective"If" the Earth Was the Size of a Basketball this would be ~ 12.80 feet(3.90 meters)  away.

Background
(as of 2017-01-11 ) 

  • Object: 2017 AG13
  • Orbit Type: Aten [NEO]
  • Approximate Diameter: 16 m - 37 m (52.4934 feet to 121.391 feet)(Absolute Magnitude: H= 26.039)
  • On the Sentry Risk Table: No (Never has been listed )
  • On the NEODyS CLOMON2 risk page: No
  • Discovery (First) observation was made: 2017 01 07.31910
  • Discovery (First )observation by: Catalina Sky Survey, Arizona, USA (MPC Code 703) The Discovery M.P.E.C.: MPEC 2017-A58 : 2017 AG13
  • Last Observation (publish):2 017 01 09.53408 (by Mt. Lemmon Survey (MPC Code G96)  )
  • Data-Arc Span (publish): 2 days
  • Number of Optical Observations(published):70
  • Observatories Reporting (Published) Observations(MPC Code):
    • (204) Schiaparelli Observatory, Italy.
    • (703) Catalina Sky Survey, US/ Arizona.
    • (958) Observatoire de Dax, France.
    • (B49) Paus Observatory, Sabadell, Spain.
    • (C44) A. Volta Observatory, Lanzo d'Intelvi, Italy.
    • (G96) Mt. Lemmon Survey, US/Arizona. 
    • (H21) Astronomical Research Observatory, Westfield, US/Illinois.
    • (I52) Steward Observatory, Mt. Lemmon Station, US/Arizona.
    • (I93) St Pardon de Conques, France.
    • (K65) Cesena, Italy.
    • (W25) RMS Observatory, Cincinnati, US/Ohio.
  • Perihelion Distance:0.5501188546601535 (AU)
  • Aphelion Distance:1.376259329339826 (AU)
  • Earth MOID: 5.66787E-5 AU (0.022 (LD)) or 5,268.614  miles ( 8,479.013 (KM))
  • Last Close-Approach to Earth: Passed the Earth on 2017-Jan-10 at a Nominal Distance of 0.00139468114617598 (AU), ( 0.543 Lunar Distance (LD)), or 129,643.712 miles (208,641.33 (KM)) -- to put things in perspective "If" the Earth Was the Size of a Basketball this would be 12.80 feet(3.90 meters) 
  • Next Close-Approach to Earth:  Will safely pass Earth on 2028-Sep-12 at a Nominal Distance of 0.336749573158621  (AU) (131.053 (LD)) or 31,302,828.42  miles (50,377,019.101(KM))
Useful Links:

Jan 11, 2017

Confirmation Image of COMET C/2017 A3 (Elenin) on 2017 01 06 from Siding Spring Observatory

A confirmation images of COMET C/2017 A3 (Elenin) on 2017-01-06
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a 120 Second Luminance BIN2 Image taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
A confirmation images of COMET C/2017 A3 (Elenin) on 2017-01-06
from Siding Spring Observatory, Coonabarabran, NSW, Australia. (MPC Q62)
a 120 Second Luminance BIN2 Image taken with iTelescope.net's
(TEL T27 0.70-m f/6.6 reflector + CCD)
Congratulations to Leonid Elenin for the discovery.

Background
(as of 2017-01-11 )
  • Object: C/2017 A3 (Elenin)
  • Orbit Type: Parabolic Comet 
  • Discovery (First) observation was made: 2017 01 05.45843
  • Discovery (First )observation by: ISON-SSO Observatory, Siding Spring (MPC Code Q60) The Discovery M.P.E.C.:MPEC 2017-A75 : COMET C/2017 A3 (Elenin) 
  • Last Observation(publish): 2017 01 10.29746 (by Polonia Observatory, San Pedro de Atacama (MPC Code W98)
  • Data-Arc Span(publish) : 5 days 
  • Number of Optical Observations(published): 84
  • Observatories Reporting (Published) Observations(MPC Code):
    •  (807) Cerro Tololo Observatory, La Serena, Chile
    • (E23) Arcadia,Australia/NSW.
    • (I47) Pierre Auger Observatory, Malargue, Argentina
    • (Q60) ISON-SSO Observatory, Siding Spring, Australia/NSW.
    • (Q62) iTelescope Observatory, Siding Spring,Australia/NSW.
    • (W88) Slooh.com Chile Observatory, La Dehesa, Chile.
    • (W96) CAO, San Pedro de Atacam (since 2013),Chile.
    • (W98) Polonia Observatory, San Pedro de Atacama, Chile.
    • (Y00) SONEAR Observatory, Oliveira, Brazil.
  • Perihelion Distance: 3.87795779921109 (AU) 
  • Earth MOID:  3.22016
  • (MPC) Observations-C/2017 A3  
  • JPL Orbit Diagram--C/2017 A3 (Elenin)
  Useful Links:

Jan 9, 2017

Confirmation images of the NEO 2017 AF5


A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-06 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T7 TEL 0.43-m f/6.8 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley

A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-06 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T7 TEL 0.43-m f/6.8 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley

A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-06 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T7 TEL 0.43-m f/6.8 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-06 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T7 TEL 0.43-m f/6.8 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-07 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T18 TEL 0.32-m f/8.0 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-07 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T18 TEL 0.32-m f/8.0 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-07 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T18 TEL 0.32-m f/8.0 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-07 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T18 TEL 0.32-m f/8.0 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-07 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T18 TEL 0.32-m f/8.0 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
A confirmation image of the Near Earth Objects 2017 AF5
on 2017-01-07 from AstroCamp Observatory. Nerpio, Spain - (MPC Code I89)
using itelescope.net's (T18 TEL 0.32-m f/8.0 reflector + CCD)
a stack of 5-60 Second Luminance BIN2 Images
(C) Steven M. Tilley
Background
(as of 2017-01-09 )
 

Useful Links:
 

Dec 7, 2016

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

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
  • 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: