Re: VELA 5 optically

From: Scott Tilley via Seesat-l <>
Date: Fri, 3 Dec 2021 13:18:05 -0800
Hi Marco

Chang’e 5 has been observed with 8” and 10” class instruments with excellent SNR at lunar distance at times. It does vary in brightness due to phase angle it seems or attitude as the latter appears be fixed in space but not from our perspective based on radio observation. 

So I’m hopeful with careful timing and attention to detail I’ll have the same luck I do with my micro x-band radio system.  Hence, my training sessions on distant small known objects to tweak the system up. 


Sent from my iPhone

> On Dec 3, 2021, at 03:07, Marco Langbroek <> wrote:
> Op 3-12-2021 om 08:42 schreef Scott Tilley via Seesat-

>> 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!

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Received on Fri Dec 03 2021 - 15:19:21 UTC

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