Same video as before, but this time I bumped up the the mid level of each frame to 1.5 before putting it into the video. 30 minute time-lapse of Comet Lulin. Taken with a Canon XTi and 8" Meade LX200 Schmidt-Cassegrain telescope. 45 second and 1 minute unguided exposures. ... https://www.youtube.com/watch?v=OieXkQFnfbo

Tracked with Brent Boshart's Satellite Tracker using an 8" LX200 and modified Samsung SDC-435 camera at f/10 (no AGC). ... https://www.youtube.com/watch?v=Kcir829Bcr0

Same as the last video, I imported SDO's orbital elements into Celestia and then recorded the sunward view on December 6, 2010. Sure enough the moon was what passed in front of the sun. I re-recorded it while having Celestia track the moon's motion in the sky while following SDO in orbit so that the video would be much smoother and you could see the ecliptic grid markings much more clearly. Those markings show that the observed upward motion of the moon was consistent with what should have been seen due to SDO's orbit around the earth. To see for yourself, just paste the following orbital elements into celestia's solarsys.ssc file below the entry for earth: "SDO:Earth I" "Sol/Earth" { Class "spacecraft" # Mesh Radius 0.005 EllipticalOrbit { Epoch 2455536.02043152 Period 0.99727900 SemiMajorAxis 42164.391 Eccentricity 0.0002434 Inclination 27.9524 AscendingNode 184.3762 ArgOfPericenter 323.7533 MeanAnomaly 11.6594 } Obliquity 27.9524 EquatorAscendingNode 184.3762 RotationOffset 118.5570 # Orientation [ ] } ... https://www.youtube.com/watch?v=sg1VRtT3q-A

Retweet this at TeamYouTube: https://twitter.com/RedsRhetoric/status/1166420711172390913 ... https://www.youtube.com/watch?v=sxJIFKVLGxo