70 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h 04m 09.86704s |
| Declination | +27° 53′ 53.9089″ |
| Apparent magnitude (V) | 6.665 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A1V |
| U−B color index | +0.05 |
| B−V color index | +0.00 |
| Astrometry | |
| Radial velocity (Rv) | −21.0±4.4 km/s |
| Proper motion (μ) | RA: −1.287 mas/yr Dec.: −1.429 mas/yr |
| Parallax (π) | 5.6109±0.1390 mas |
| Distance | 580 ± 10 ly (178 ± 4 pc) |
| Absolute magnitude (MV) | 0.24 |
| Details | |
| Radius | 2.7 R☉ |
| Luminosity | 75.57 L☉ |
| Temperature | 8,887+352 −376 K |
| Other designations | |
| 70 Cnc, BD+28°1683, HD 77557, HIP 44512, HR 3601, SAO 80609 | |
| Database references | |
| SIMBAD | data |
70 Cancri is a star in the zodiac constellation of Cancer, located around 580 light years from the Sun. It is a challenge to view with the naked eye even under good seeing conditions, having an apparent visual magnitude of 6.7. The star is moving closer to the Earth with a heliocentric radial velocity of -21 km/s, and is expected to come to within 44 light-years in around nine million years. It is an A-type main-sequence star with a stellar classification of A1V. The object has a radius of about 2.7 R☉ and is radiating 76 times the Sun's luminosity from its photosphere at an effective temperature of 8,887 K.