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Near-Earth Asteroid 2021 JQ2 @ 0.4 Lunar Distance

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#1 John Rogers

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Posted 09 May 2021 - 09:53 AM

20210508_0550.8UTC_C5JC9N2.jpg

12-inch LX200 operating at f3.8

Apogee Alta F4000 CCD camera

Stack of 10, 2.5second exposures using Tycho-Tracker

 

From discovery at 20th magnitude until it was last observed, this minor planet was only visible for 21 hours.  I happened to check the NEO Confirmation Page and noticed it was bright enough for me to capture with my system, although moving at 5"/sec, it was a challenge to keep it in the field-of-view.  The exposure had to be kept short to keep it from trailing between images

 

It was at 0.4 lunar distances and around magnitude 17 at mid-exposure.

 

 


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#2 rachnoman

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Posted 09 May 2021 - 10:00 AM

Great capture !.


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#3 dhkaiser

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Posted 09 May 2021 - 10:27 AM

Quite an accomplishment.


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#4 Dave Mitsky

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Posted 09 May 2021 - 12:33 PM

Well done!



#5 Tapio

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Posted 09 May 2021 - 12:59 PM

Nice.
Are you using a f/3.3 reducer?

#6 Rutilus

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Posted 09 May 2021 - 01:13 PM

Excellent work.


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#7 John Rogers

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Posted 09 May 2021 - 01:59 PM

Thanks everyone.

 

Nice.
Are you using a f/3.3 reducer?

Its a Celestron f6.3 reducer.  In order for the off-axis guider port to achieve focus, additional backfocus is required for the main camera, resulting in f3.8.




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