Upsilon2 Cancri
Upsilon2 Cancri (υ2 Cancri) is a faint, yellow-hued star in the zodiac constellation of Cancer. It is near the lower brightness limit of stars that can be viewed with the naked eye, having an apparent visual magnitude of +6.35. Based upon an annual parallax shift of 5.1325 mas as seen from our orbit, this system is roughly 635 light-years away.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 33m 00.10385s |
| Declination | +24° 05′ 05.2560″ |
| Apparent magnitude (V) | +6.35 |
| Characteristics | |
| Spectral type | G9 III |
| U−B color index | +0.88 |
| B−V color index | +1.02 |
| Astrometry | |
| Radial velocity (Rv) | +73.7±0.5 km/s |
| Proper motion (μ) | RA: −63.80 mas/yr Dec.: −46.40 mas/yr |
| Parallax (π) | 5.1325 ± 0.0407 mas |
| Distance | 635 ± 5 ly (195 ± 2 pc) |
| Absolute magnitude (MV) | +1.13 |
| Details | |
| Radius | 15.43 R☉ |
| Luminosity | 120 L☉ |
| Surface gravity (log g) | 2.43±0.11 cgs |
| Temperature | 4881±44 K |
| Metallicity [Fe/H] | 0.00±0.05 dex |
| Rotational velocity (v sin i) | 2.7 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved G-type giant star with a stellar classification of G9 III. It is radiating 98 times the Sun's luminosity from its photosphere at an effective temperature of 4,881 K. Upsilon2 Cancri is a member of the Epsilon Indi Moving Group of stars that share a common motion through space.
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