Open cluster · Taurus
NGC 1817 Poor Man's Double Cluster
mag 7.79.3′ across
About
NGC 1817, the Poor Man's Double Cluster, is an open cluster of magnitude 7.7 in Taurus, about 9.3′ across.
How to find it
- NGC 1817 is in the constellation Taurus.
- Best evenings: around late January 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 63° 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)A faint, grainy patch.
- Telescope (6–8 inch)A group of faint stars.
For a dark country sky with no Moon. From a city, faint galaxies and nebulae can disappear completely.
Facts
| Designations | NGC 1817 |
|---|---|
| Type | Open cluster |
| Magnitude | 7.7The smaller the number, the brighter. |
| Apparent size | 9.3′the full Moon is 31′ across |
| Constellation | Taurus |
| Right ascension (J2000) | 05h 12m 26.3s |
| Declination (J2000) | +16° 41′ 03″ |
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 →