Geminga
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 33m 54.15s |
| Declination | +17° 46′ 12.9″ |
| Apparent magnitude (V) | 25.5 |
| Characteristics | |
| Evolutionary stage | Pulsar |
| Astrometry | |
| Parallax (π) | 4.0±1.3 mas |
| Distance | ~815 ly (250+120 −62 pc) |
| Details | |
| Rotation | 0.237 s |
| Age | 339,000 years |
| Other designations | |
| SN 437, PSR B0633+17, PSR J0633+1746 | |
| Database references | |
| SIMBAD | data |
Geminga (/ɡəˈmɪŋɡə/ gə-MING-gə) is a gamma ray and x-ray pulsar source thought to be a neutron star approximately 250 parsecs (around 800 light-years) from the Sun in the constellation Gemini.
Its name, attributed by its discoverer Giovanni Bignami, is both a contraction of Gemini gamma-ray source and a transcription of the words gh'è minga (pronounced [ɡɛ ˈmĩːɡa]), meaning "it's not there" in Bignami's native Milanese dialect of Lombard. The name was approved by the International Astronomical Union on 4 April 2022.