Omicron1 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 57m 14.950s |
| Declination | +15° 19′ 21.96″ |
| Apparent magnitude (V) | +5.20 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A5 III |
| B−V color index | +0.1540 |
| Astrometry | |
| Radial velocity (Rv) | −4.6±2.8 km/s |
| Proper motion (μ) | RA: +60.732 mas/yr Dec.: +20.396 mas/yr |
| Parallax (π) | 20.3294±0.0891 mas |
| Distance | 160.4 ± 0.7 ly (49.2 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.92 |
| Details | |
| Mass | 2.02 M☉ |
| Radius | 1.86 R☉ |
| Luminosity | 13.4 L☉ |
| Surface gravity (log g) | 3.982+0.008 −0.005 cgs |
| Temperature | 8,145±3 K |
| Metallicity [Fe/H] | −0.85+0.09 −0.04 dex |
| Rotational velocity (v sin i) | 90 km/s |
| Age | 598 Myr |
| Other designations | |
| ο1 Cnc, 62 Cancri, BD+15°1945, HD 76543, HIP 43970, HR 3561, SAO 98247 | |
| Database references | |
| SIMBAD | data |
Omicron1 Cancri is a solitary, white-hued star in the zodiac constellation of Cancer. Its name is a Bayer designation that is Latinized from ο1 Cancri, and abbreviated Omicron1 Cancri or ο1 Cnc. This star is faintly visible to the naked eye with an apparent visual magnitude of +5.20. Based upon an annual parallax shift of 20.33 mas as seen from Earth, it is located 160 light-years (49 pc) away from the Sun. It most likely forms a co-moving pair with Omicron2 Cancri.
With a stellar classification of A5 III, this presents as an evolved, A-type giant star. At the age of about 600 million years, it has double the mass of the Sun and 1.86 times the Sun's radius. Omicron1 Cancri is radiating 13.4 times the solar luminosity from its photosphere at an effective temperature of about 8,145 K. It has a high rate of spin, showing a projected rotational velocity of 90 km/s.
Omicron1 Cancri has an infrared excess, indicating it surrounded by a circumstellar debris disk. The signature matches a two-component disk with the spatially separated belts having temperatures of 146 K and 81 K.