Geminga (PSR J0633+1746)
Also known as Geminga · PSR J0633+1746
Geminga (PSR J0633+1746) is a pulsar (radio-quiet, gamma-ray) in the constellation Gemini, about 815 light-years from Earth.
Visible in gamma rays and X-rays but barely at all in radio — a reminder that "radio source" doesn't cover every pulsar.
Facts
| Type | Pulsar (radio-quiet, gamma-ray) |
|---|---|
| Constellation | Gemini |
| Position (J2000) | 6h 33m 54s, +17° 46′ |
| Distance | 815 light-years (its light set off about 820 years ago) |
| Studied in | 1,324 scientific papers (SIMBAD) |
When and how to see it
Geminga (PSR J0633+1746) is highest in the sky at midnight in December. From India (about 20° N) it climbs to about 88° above the horizon; from 50° N, to about 58°.
Heights are worked out for India and for 50° N. Set your location in Settings to see them for where you are.
For tonight's best time from your own town, the darkness and the Moon, open it on the map and see its "Tonight from your location" card.
More in Gemini
Everything in Gemini · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Deep Sky Monitor's own notes · Data sources & credits