Re: VELA 5 optically

From: Marco Langbroek via Seesat-l <>
Date: Fri, 3 Dec 2021 12:07:55 +0100
Op 3-12-2021 om 08:42 schreef Scott Tilley via Seesat-l:

> Next step is trying for optical observations of Chang'e 5.

That might need a slightly bigger instrument. A couple of years ago, I have been 
following two Chang'e objects in translunar orbits for a while, using telescopes 
in the 35-cm to 60-cm range. They varied in brightness (due to SRP induced 
tumbling) between mag +17 and invisible.

Still: do try!

They are interesting objects: their orbits are significantly influenced by SRP 
and lunar gravity, and their orbital evolution over the longer term is chaotic 
(which is why they are frequently lost, and then found again by some NEA survey 
and initially misidentified as a NEA)

- Marco

Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.

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Received on Fri Dec 03 2021 - 05:09:10 UTC

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