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 | |
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.
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 | |
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.