IF the Earth was the size of a basketball how far away would NEO Earth close approaches be?

IF the Earth was the size of a  basketball how far away would NEO Earth close approaches be? Here is a list of The 100 closest observed NEO Earth close approaches as of 2018-09-26.

The Comet 46P/Wirtanen on 2018-09-22 from (MPC Q62)

The Comet 46P/Wirtanen
on 2018-09-22 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

The Comet 46P/Wirtanen
on 2018-09-22 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

The Comet 46P/Wirtanen
on 2018-09-22 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

The Comet 46P/Wirtanen
on 2018-09-22 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

The Comet 46P/Wirtanen
on 2018-09-22 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack(Add) of 60 - 60 second luminance BIN2 images
taken with iTelescope.net's (T17)
By Steven M. Tilley

The Comet 46P/Wirtanen
on 2018-09-22 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack(Average) of 60 - 60 second luminance BIN2 images
taken with iTelescope.net's (T17)
By Steven M. Tilley

The Comet 46P/Wirtanen
on 2018-09-22 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack(Median) of 60 - 60 second luminance BIN2 images
taken with iTelescope.net's (T17)
By Steven M. Tilley

These observations were made in support of the PACA_46P/Wirtanen campaign

Confirmation images of the NEO 2018 RP8

The NEO(Aten) 2018 RP8 (approximate diameters 320 m - 710 m [ 1049.87 foot -  2329.4 foot]) was first observed by ATLAS HKO (Asteroid Terrestrial-Impact Last Alert System)  on 2018-09-15. The observations were submitted to the Minor Planet Center(MPC) in Cambridge, Massachusetts using the observer-assigned temporary designation A108wr0. This "new" asteroid was posted to the NEO Confirmation Page(NEOCP) informing observers around the world that "A108wr0" needed confirmation observations.  In an  effort to help in the confirmation  I obtain 60-15 Second Luminance BIN2 taken using  iTelescope.net's(T21).


I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 4 sets(stacks) of  15 images.  Each image was shifted match movement of  A108wr0.
.

Confirmation image of the NEOCP(NEO Confirmation Page)object A108wr0 (now 2018 RP8)

from Mayhill, New Mexico 

[New Mexico Skies](MPC Code H06) 

15-15 second luminance BIN2 images

 taken with iTelescope.net's (T21)

By Steven M. Tilleyn

Confirmation image of the NEOCP(NEO Confirmation Page)object A108wr0 (now 2018 RP8)
from Mayhill, New Mexico 
[New Mexico Skies](MPC Code H06) 
15-15 second luminance BIN2 images
 taken with iTelescope.net's (T21)
By Steven M. Tilleyn

Confirmation image of the NEOCP(NEO Confirmation Page)object A108wr0 (now 2018 RP8)
from Mayhill, New Mexico 
[New Mexico Skies](MPC Code H06) 
15-15 second luminance BIN2 images
 taken with iTelescope.net's (T21)
By Steven M. Tilleyn

Confirmation image of the NEOCP(NEO Confirmation Page)object A108wr0 (now 2018 RP8)
from Mayhill, New Mexico 
[New Mexico Skies](MPC Code H06) 
15-15 second luminance BIN2 images
 taken with iTelescope.net's (T21)
By Steven M. Tilleyn

Confirmation image of the NEOCP(NEO Confirmation Page)object A108wr0 (now 2018 RP8)

from Mayhill, New Mexico 

[New Mexico Skies](MPC Code H06) 

60-15 second luminance BIN2 images

 taken with iTelescope.net's (T21)

By Steven M. Tilleyn

I submitted my observations to the  Minor Planet Center(MPC).

On 2018 Sept. 8 at 21:42 UTC the MPC Issued MPEC 2018-S25 : 2018 RP8 assigning the objet the provisonal designation 2018 RP8.

How Are Minor Planets Named?

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)

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 2018-09-09 2018 RQ1 as a data-arc span of 31.5 hr with 22 published observations. 2018 RQ1 is listed on the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.(as of 2018-09-09) In an  effort to help with the improvement  of the known orbit I had iTelescope.net's(T30) start taking images and was able to obtain 22-30 Second Luminance BIN2. I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 3 sets(stacks) of  7 images.  Each image was shifted match the movement of  2018 RQ1.

An image of the NEO 2018 RQ1
on 2018-09-09 from
Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 22-30 second luminance BIN2 images
taken with iTelescope.net's (T30)
by Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-09 from
Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 7-30 second luminance BIN2 images
taken with iTelescope.net's (T30)
by Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-09 from
Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 7-30 second luminance BIN2 images
taken with iTelescope.net's (T30)
by Steven M. Tilley

An image of the NEO 2018 RQ1
on 2018-09-09 from
Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 7-30 second luminance BIN2 images
taken with iTelescope.net's (T30)
by Steven M. Tilley

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

Confirmation images of the NEO 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. It was posted to the NEO Confirmation Page(NEOCP) under the observer-assigned temporary designations "ZR388AE"  In an  effort to help in the confirmation I obtain 60-30 Second Luminance BIN2 taken using  iTelescope.net's(T31).

Orbit diagram for 2018 RQ1
Earth Distance: 0.031 au
Sun Distance: 1.025 au
2018-09-08 16:25 UTC
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018RQ1

Orbit diagram for 2018 RQ1
Earth Distance: 0.031 au
Sun Distance: 1.025 au
2018-09-08 16:25 UTC
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018RQ1

Orbit diagram for 2018 RQ1
Earth Distance: 0.031 au
Sun Distance: 1.025 au
2018-09-08 16:25 UTC
courtesy of NASA/JPL-Caltech
https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2018RQ1

I use Astrometrica to do the data reduction by way of the stack and track method. I had Astrometrica stack 3 sets(stacks) of  20 images.  Each image was shifted match movement of  2018 RQ1(ZR388AE).

A confirmation image of the NEO 2018 RQ1(ZR388AE)
on 2018-09-08 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 20-30 second luminance BIN2 images
taken with iTelescope.net's (T31)
by Steven M. Tilley

A confirmation image of the NEO 2018 RQ1(ZR388AE)
on 2018-09-08 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 20-30 second luminance BIN2 images
taken with iTelescope.net's (T31)
by Steven M. Tilley

A confirmation image of the NEO 2018 RQ1(ZR388AE)
on 2018-09-08 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 20-30 second luminance BIN2 images
taken with iTelescope.net's (T31)
by Steven M. Tilley

A confirmation image of the NEO 2018 RQ1(ZR388AE)
on 2018-09-08 from Siding Spring Observatory,
Coonabarabran, NSW, Australia. (MPC Q62)
a stack of 60-30 second luminance BIN2 images
taken with iTelescope.net's (T31)
by Steven M. Tilley

I submitted my observations to the  Minor Planet Center(MPC). On 2018 Sept. 8 at 21:42 UTC the MPC Issued MPEC 2018-R63 : 2018 RQ1  assigning the objet the provisonaldesignation 2018 RQ1.

How Are Minor Planets Named?

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.