This is a cross-eye 3D rendition of the data captured on 2020-09-10 at around 19:07Z, both frames a stack of 90 seconds, with only two seconds apart. HEQ5, N250/1200, TSO ADC, automated filter wheel, Baader IR-pass 650 filter, ASI 462MC (cooled), home observatory, mountpusher The frames are arranged so that Io does indeed look to be closer to the viewer.
Jupiter 3D – 2020-09-10
Io, Callisto 2020-09-21
HEQ5, N250/1200, TSO ADC, automated filter wheel, ASI 462MC (cooled), home observatory, mountpusher
Jupiter and Ganymede 2020-09-19
HEQ5, N250/1200, TSO ADC, automated filter wheel, ASI 462MC (cooled), home observatory, mountpusher
Jupiter 2020-09-06
HEQ5, N250/1200, TSO ADC, ASI 462MC (cooled), IR-pass 650, home observatory, mountpusher
Moon: Philolaus 2020-08-29
HEQ5, N250/1200, TSO ADC, ASI 462MC (cooled), home observatory, mountpusher
Jupiter and Callisto on 2020-09-05
Jupiter, Callisto, and Ganymede’s shadow are featured. HEQ5, N250/1200, TSO ADC, filters, ASI 462MC (cooled), home observatory, mountpusher
IR-pass 650
Callisto, Jupiter, Ganymede’s shadow and Ganymede. UV/IR cut filter
Estimating the length of planetary videos
There’s a legend among amateur astronomers that, without derotation, Jupiter supports only 90 seconds of raw video. Anything above it: derotate.
It always felt fishy to me, even before I started doing planetary photography. Due to other reasons, like capturing the moons’ movement, and the interplay of shadows, I always tried to keep the videos short.
However, the subject is evergreen wherever there are newcomers. So, now I made the math, and since we are people, not mathboys, here’s a handy little table one can play with or scroll below, the same calculator loads into this article.
Jupiter, Ganymede, Io 2020-08-29
HEQ5, N250/1200, TSO ADC, ASI 462MC (cooled), home observatory, mountpusher
Jupiter with a diagonal line — 2020-08-20
Yesterday was like any other day, using the little time I have left with this part of the sky — long live the real estate maffia. So I turned on the telescope to record Jupiter. At first, I thought the feature is a piece of hair or something similar, but it moves together with Jupiter, so it should be on Jupiter — or a really extreme case of an artifact from the workflow. I’ve never seen something this big on Jupiter. HEQ5, N250/1200, TSO ADC, ASI 224MC (cooled), home observatory, mountpusher
Hypotheses:
1. a random alignment of features. Could be proved by feature tracking, but I have no data for the last seven days. It’s been raining.
2. scars from an impact event, a row of meteors hit Jupiter some time before my session.
3. ?
In the meanwhile, I received notice from two independent observers that the feature is visible on their pictures too: https://www.asztrofoto.hu/galeria_image/1598019963 and https://www.asztrofoto.hu/galeria_image/1598020097
Jupiter, 5 minutes derotated, showing the same feature, 1933Z
Szaturnusz 2020-07-29
This is Saturn as imaged at 2020-07-29 21:52Z, with HEQ5, N250/1200, TSO ADC, ASI 224MC (cooled), home observatory, mountpusher
