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What was near M74 Sunday night?

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#1 GoldSpider

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Posted 19 September 2023 - 06:56 AM

When I was processing my M74 data from Sunday night I noticed a distinct moving object that tracked perfectly with my exposure sets as it cycled through filters Ha R G L B R G L B.  Stellarium showed a satellite near the area but moving much much faster than what I captured.

 

Object Near M74

 

The captures start at Sept. 16, 11:41pm EST through Sept. 17 4:09am EST.

 

What did I capture??


Edited by GoldSpider, 19 September 2023 - 06:56 AM.

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#2 firemachine69

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Posted 19 September 2023 - 07:44 AM

The CIA would like to have a word with you... grin.gif


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#3 RSJ

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Posted 19 September 2023 - 08:06 AM

It was likely Asteroid (120) Lachesis @ Magnitude: 13.0; it was the closest and brightest of many in the area.


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#4 GoldSpider

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Posted 19 September 2023 - 08:14 AM

It was likely Asteroid (120) Lachesis @ Magnitude: 13.0; it was the closest and brightest of many in the area.

I believe you are correct!

 

https://in-the-sky.o...nth=9&year=2023

 

Thank you!


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#5 Sebastian_Sajaroff

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Posted 19 September 2023 - 09:56 AM

Welcome to asteroid hunt team !

I observe them quite often, it's one of those targets not affected by light pollution. 


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#6 *skyguy*

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Posted 20 September 2023 - 07:10 AM

 

What did I capture??

Definitely ....  asteroid 120 Lachesis.

 

Nice catch!
 

120-Lachesis.jpg


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#7 UnityLover

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Posted 22 September 2023 - 10:51 AM

Wait, how fast do asteroids like this move? 1 arcminute/m? 2.5/m?



#8 Keith Rivich

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Posted 22 September 2023 - 09:54 PM

Wait, how fast do asteroids like this move? 1 arcminute/m? 2.5/m?

I'm trying to remember from my asteroid hunting days. I believe main belt asteroids cover about 1/2° per day. We would shoot images 15 minutes apart to detect movement when blinking. 


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#9 RSJ

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Posted 20 October 2023 - 10:58 PM

Sorry for the late reply but velocity is below...

 

Asteroid

(120) Lachesis

Magnitude: 12.5

Phase: 2 °

Distance: 2.2838au

Solar distance: 3.2753au

Velocity: 16.1km/s

Date: 2023-10-18 03h15m00s

ref: E2023-S82/2023-09-13

Hourly motion: 31.0" PA:254° dRA:-02.05s dDec:-08.8"




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