Elliptical galaxy · Cassiopeia
NGC 147
Also known as: C17
mag 9.79.4′ across
About
NGC 147 is an elliptical galaxy of magnitude 9.7 in Cassiopeia, about 9.4′ across.
How to find it
- NGC 147 is in the constellation Cassiopeia.
- Best evenings: around mid-November it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
- Where on Earth: it is seen well, at least 10° up, from north of 31° S.
When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.
What you will see
- EyesNot visible to the naked eye.
- Binoculars (10×50)Too faint for binoculars.
- Telescope (6–8 inch)A smooth oval glow, brightening towards the centre.
For a dark country sky with no Moon. From a city, faint galaxies and nebulae can disappear completely.
Facts
| Designations | NGC 147, C17, PGC 2004, UGC 326 |
|---|---|
| Type | Elliptical galaxy (E) |
| Magnitude | 9.7The smaller the number, the brighter. |
| Apparent size | 9.4′ × 5.4′position angle 26°; the full Moon is 31′ across |
| Surface brightness | 24.3 mag/arcsec²Average over its disc, in the blue band: the lower the number, the easier it is to see. |
| Constellation | Cassiopeia |
| Right ascension (J2000) | 00h 33m 12.1s |
| Declination (J2000) | +48° 30′ 31″ |
More in Cassiopeia
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Sources and credits
Catalog data: OpenNGC by Mattia Verga, CC BY-SA 4.0, and d3-celestial by Olaf Frohn, BSD 3-Clause. All data sources →