Global InformationIota Crateris information
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Crater |
| Right ascension | 11h 38m 40.01668s[1] |
| Declination | −13° 12′ 06.9963″[1] |
| Apparent magnitude (V) | 5.48[2] |
| Characteristics | |
| Spectral type | F6.5 V[3] |
| B−V color index | +0.52[2] |
| Astrometry | |
| Radial velocity (Rv) | −26.6±0.3[4] km/s |
| Proper motion (μ) | RA: +99.52[1] mas/yr Dec.: +125.99[1] mas/yr |
| Parallax (π) | 37.41 ± 0.30 mas[1] |
| Distance | 87.2 ± 0.7 ly (26.7 ± 0.2 pc) |
| Absolute magnitude (MV) | +3.33[5] |
| Details | |
| ι Crt A | |
| Mass | 1.19+0.06 −0.02[6] M☉ |
| Surface gravity (log g) | 4.27±0.03[7] cgs |
| Temperature | 6,230±21[7] K |
| Metallicity [Fe/H] | −0.15±0.01[7] dex |
| Age | 4.45+0.32 −0.94[6] Gyr |
| ι Crt B | |
| Mass | 0.57[8] M☉ |
| Other designations | |
ι Crt, 24 Crateris, BD−12° 3466, GJ 3677, HD 101198, HIP 56802, HR 4488, SAO 156802.[9] | |
| Database references | |
| SIMBAD | data |
Iota Crateris (ι Crateris) is the Bayer designation for a binary star[10] system in the southern constellation of Crater. It is faintly visible to the naked eye with an apparent visual magnitude of 5.48.[2] According to the Bortle scale, this means it can be viewed from suburban skies at night. Based upon an annual parallax shift of 37.41 mas,[1] Iota Crateris is located 87 light years from the Sun.
This is an astrometric binary system with an estimated orbital period of roughly 79,000 years.[10] The primary, component A, is an F-type main sequence star with a stellar classification of F6.5 V,[3] which is generating energy through the thermonuclear fusion of hydrogen in its core region. It is around 4.45[6] billion years old with 1.19[6] times the mass of the Sun. The star is radiating energy from its outer atmosphere at an effective temperature of 6,230 K.[7]
The companion, component B, is a red dwarf star with a probable classification of M3, although its mass estimate of 0.57 solar would be more consistent with an M0 class star.[8] As of 2014, this magnitude 11.0 star had an angular separation of 1.10 arc seconds along a position angle of 248°.[11] It has a projected separation of 25 AU,[8] which means it is positioned at least this distance away from the primary.
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