- H250 minutes (50 frames)
- O135 minutes (27 frames)
- S155 minutes (31 frames)
Star cluster NGC 6823 is an open cluster located in the constellation Vulpecula. It is about 50 light-years in diameter and lies about 6,000 light-years from Earth. The cluster's center contains young, bright blue stars, while its outer regions contain even younger stars and the emission nebula NGC 6820.
The cluster formed only about two million years ago and is dominated by bright stars. The huge columns of gas and dust in the nebula were probably sculpted into elongated shapes by the destructive effects of hot radiation from the cluster's brightest stars. NGC 6823 is part of the Vulpecula OB1 stellar association.
NGC 6820 is a small reflection nebula located near the open cluster NGC 6823. The nebula and cluster are contained within the larger, faint emission nebula Sh 2-86, which is sometimes also called NGC 6820.
NGC 6823 is visible with small binoculars due to its apparent magnitude of 7.1. Also nearby are the Silly Bell Nebula (M27), located 3 degrees to the east, and α Vulpeculae, located 3 degrees to the west.
| Photo | Date | Frames | Exposure | H | O | S |
|---|---|---|---|---|---|---|
 | 23 Nov 2025 | 108 | 09:00 | 04:10 | 02:15 | 02:35 |
 | 06 Feb 2021 | 48 | 04:00 | 01:30 | 01:20 | 01:10 |
Star Cluster (NGC 6823) visibility chart over 24 hours
| Date | Moon phase | Exposure | CCD temperature | Gain | Offset | Filter |
|---|---|---|---|---|---|---|
- 2023ixf•
- 40 Eri•
- Abell 74•
- Artemis A868 SA•
- a Canis Minoris•
- C 2020 R4 ATLAS•
- C 2020 T2 Palomar•
- C 2021 S3 (PANSTARRS)•
- Haumea (2003 EL61)•
- HCG 68•
- HCG 92•
- IC 1318B•
- IC 1396•
- IC 1795•
- IC 1805•
- IC 1848•
- IC 1871•
- IC 3322A•
- IC 342•
- IC 4015•
- IC 405•
- IC 417•
- IC 434•
- IC 443•
- IC 4703•
- IC 5070•
- IC 5146•
- IC 63•
- M 1•
- M 101•
- M 103•
- M 109•
- M 13•
- M 15•
- M 27•
- M 3•
- M 33•
- M 42•
- M 45•
- M 5•
- M 51•
- M 57•
- M 63•
- M 64•
- M 74•
- M 76•
- M 81•
- M 82•
- M 86•
- M 87•
- M 94•
- M 97•
- NGC 147•
- NGC 1491•
- NGC 1499•
- NGC 1579•
- NGC 1961•
- NGC 2146•
- NGC 2239•
- NGC 2403•
- NGC 281•
- NGC 4236•
- NGC 4565•
- NGC 4631•
- NGC 507•
- NGC 508•
- NGC 5866•
- NGC 5907•
- NGC 6503•
- NGC 6823•
- NGC 6888•
- NGC 6946•
- NGC 6992•
- NGC 6995•
- NGC 7000•
- NGC 7023•
- NGC 7129•
- NGC 7217•
- NGC 7331•
- NGC 7380•
- NGC 7538•
- NGC 7635•
- NGC 7640•
- NGC 7822•
- NGC 891•
- NGC 896•
- NGC 925•
- PGC 54559•
- Sh2-155•
- Sh2-168•
- Sh2 103•
- Sh2 109•
- Sh2 132•
- T CrB•
- UGC 6930•
- V1405 Cas•
- Vesta A807 FA•