Iota Cancri
 Iota Cancri Credit: Jeffrey Fisher | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Iota Cancri A | |
| Right ascension | 08h 46m 41.81988s |
| Declination | +28° 45′ 35.6190″ |
| Apparent magnitude (V) | 4.028 |
| Iota Cancri B | |
| Right ascension | 08h 46m 39.98118s |
| Declination | +28° 45′ 54.1932″ |
| Apparent magnitude (V) | 6.57 |
| Characteristics | |
| Spectral type | G8Iab + A2V |
| Astrometry | |
| Iota Cancri A | |
| Radial velocity (Rv) | 15.74 ± 0.13 km/s |
| Proper motion (μ) | RA: -21.58 ± 0.75 mas/yr Dec.: -45.69 ± 0.56 mas/yr |
| Parallax (π) | 9.85 ± 0.61 mas |
| Distance | 330 ± 20 ly (102 ± 6 pc) |
| Iota Cancri B | |
| Radial velocity (Rv) | 25.00 ± 1.5 km/s |
| Proper motion (μ) | RA: -22.74 ± 3.45 mas/yr Dec.: -46.36 ± 2.56 mas/yr |
| Parallax (π) | 11.69 ± 2.75 mas |
| Distance | approx. 280 ly (approx. 90 pc) |
| Other designations | |
48 Cancri, | |
| Iota Cancri A: 48 Cancri A, HR 3475, HD 74739, BD+29°1824, HIP 43103, SAO 80416 | |
| Iota Cancri B: 48 Cancri B, HR 3474, HD 74738, BD+29°1823, HIP 43100, SAO 80415 | |
Iota Cancri (ι Cnc, ι Cancri) is a double star in the constellation Cancer. The brighter component is approximately 298 light years from Earth.
The brighter star is a yellow G-type bright giant with an apparent magnitude of +4.02. The companion is a white A-type main sequence dwarf with an apparent magnitude of +6.57. The two stars are separated by 30.6 arcseconds on the sky, and are resolvable through a small telescope.[1]
Despite having different distances when measured by the HIPPARCOS satellite, the two stars share a common proper motion and appear to be a natural binary star system.[1]
References
- ^ a b Kaler, James B. "Iota Cancri". Stars. University of Illinois. Retrieved 29 May 2015.
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