NGC 884 (also known as χ Persei) is an open cluster located 7640 light years away in the constellation of Perseus. It is the east component of the Double Cluster with NGC 869. NGC 869 and 884 are often designated h and χ Persei, respectively. The cluster is about 14 million years old. Located in the Perseus OB1 association, both clusters are located physically close to one another, only a few hundred light years apart.
| Object | NGC884/869 Double Star Clusters |
| Constellation: | Perseus |
| Position: | RA 02h 22.0m DEC +57° 08′ |
| Apparent Size: | 30 arcmins |
| Apparent Magnitude: | 3.8 |
| Distance in light years: | 7600 ly |
| Photo Data | |
| Date of Expose: | 28.12.2016 18:20 UTC |
| Location: |
Knottenried/Oberallgäu/Germany (1002m ASL) GPS: 47°36’13“ N / 10°11’24“ E |
| Sky darkness SQM-L | Zenit 20.85mag/sqrsec, Object 20.85 mag/sqrsec |
| Telescope: | Meade 8" SC ACF 1524mm FR f/7.5 (focal reducer 0.75) |
| Camera: | Sony A7Ra (astromodified) @ T sensor = -2°C |
| Field of View: | deg |
| Pixel Scale/Resolution: | .arcsec/px |
| Expose frames/times: | OSC ISO 3200, RAW 7x60s, 5 darks |
| Total expose: | 7min 0s |
| Filter: | no |
| Mount: | HPS 10Micron GM 3000 |
| Software: | DSS 3.3.4, Photoshop CC |
| Remarks: |
© Photos by Peter Cerveny
© Object description/intro text fully or partially by Wikipedia,
which is released under the Creative Commons Attribution-ShareAlike 4.0 International License