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. e-mail: sattrackcam_at_langbroek.org launchtower: http://launchtower.langbroek.org Station (b)log: http://sattrackcam.blogspot.com Twitter: _at_Marco_Langbroek ----- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Dec 03 2021 - 05:09:10 UTC
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