When to photograph NGC 7822
NGC 7822 is an emission nebula in Cepheus, 100′ across.
When to photograph it
From 45° N the best months are October to December, with up to 10.3 hours of astronomical darkness above 30° in November. It reaches 68° at its highest. It never sets from this latitude, so some imaging is possible all year.
From 35° S it never rises.
Framing
Its long axis is 100′. It fills 35 to 80% of the short side of an APS-C sensor at about 190 to 430 mm, and of a full-frame sensor at about 290 to 660 mm.
Filters and the moon
It glows in H-alpha, and often OIII, so a dual-band filter on a color camera or narrowband filters on a mono camera cut light pollution and keep it workable with the moon up. The dark sky calendar shows which nights this month are moon-free where you are.
Plan it for tonight
Dates and times depend on your exact location. The imaging planner shows NGC 7822's altitude through tonight, its transit time and its distance from the moon. For sub length, use the exposure calculator.
Nearby targets
- NGC 40 Bow-Tie nebula 5.4° away
- M 52 7.0° away
- NGC 7635 Bubble Nebula 7.5° away
- C 9 Cave Nebula 8.3° away
- IC 59 8.4° away
- IC 63 Ghost of Cassiopeia 8.7° away
Gear that suits NGC 7822
NGC 7822 is 100′ along its long axis. These frame it on an APS-C sensor with room to crop. It shines in H-alpha and OIII, so a dual-band filter on a color camera cuts through light pollution and moonlight.
- William Optics RedCat 51 250 mm f/4.9: fills 47% of an APS-C frame's short side View at High Point Scientific
- William Optics RedCat 61 300 mm f/4.9: fills 56% of an APS-C frame's short side View at High Point Scientific
- Askar FRA400 400 mm f/5.6: fills 75% of an APS-C frame's short side View at High Point Scientific
- Optolong L-Ultimate 3 nm 3 nm dual-band, Ha, OIII, for color cameras View at High Point Scientific
- Antlia ALP-T 5 nm 5 nm dual-band, Ha, OIII, for color cameras View at High Point Scientific
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