Cassiopeia Cas
Cassiopeia is one of the 88 constellations, covering 598 square degrees of the sky (25th largest). It is highest at midnight in October and best in the evening sky in November and December.
18 of its best-known objects have a page of their own here.
Facts
| Abbreviation | Cas |
|---|---|
| Size | 598 square degrees (25th largest of the 88; the full Moon covers about 0.2) |
| Middle (J2000) | 1h 01m, +63° |
| Highest at midnight | October (in the evening, around 8–10 pm: November and December) |
| How high | From India (about 20° N) its middle climbs to about 47° above the horizon; from 50° N, to about 77°. |
| Pages here | 18 objects |
Nebulae
5Star clusters
3Planetary systems
1Stars
6Other objects
3Brightest NGC and IC objects
OpenNGC| Object | Type | Magnitude | Size |
|---|---|---|---|
| NGC 457 (Owl Cluster) | Open star cluster | 6.4 | 7.8′ |
| NGC 129 (on the map) | Open star cluster | 6.5 | 5.4′ |
| IC 1805 | Star cluster with nebula | 6.5 | 60′ |
| IC 1848 | Star cluster with nebula | 6.5 | 40′ |
| NGC 654 (on the map) | Open star cluster | 6.5 | 6.3′ |
| NGC 1027 (on the map) | Open star cluster | 6.7 | 7.8′ |
| NGC 7789 (on the map) | Open star cluster | 6.7 | 14.4′ |
| M52 · NGC 7654 | Open star cluster | 6.9 | 9.9′ |
| NGC 225 (on the map) | Open star cluster | 7 | 4.2′ |
| NGC 663 (on the map) | Open star cluster | 7.1 | 6′ |
| M103 · NGC 581 | Open star cluster | 7.4 | 4.5′ |
| NGC 659 (on the map) | Open star cluster | 7.9 | 4.2′ |
Smaller magnitudes are brighter; the faintest stars the eye sees are about 6. The full Moon is about 31′ across.
Data: IAU constellation boundaries (Roman 1987) · OpenNGC (Mattia Verga, CC BY-SA 4.0) · Data sources & credits