Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Horologium |
Right ascension | 02h 24m 53.91034s [1] |
Declination | −60° 18′ 43.0170″ [1] |
Apparent magnitude (V) | +5.35 [2] |
Characteristics | |
Spectral type | F2III [3] |
B−V color index | +0.39 [2] |
Astrometry | |
Radial velocity (Rv) | +28.34±0.41 [1] km/s |
Proper motion (μ) |
RA: −71.892
[1]
mas/
yr Dec.: −131.088 [1] mas/ yr |
Parallax (π) | 21.0119 ± 0.1004 mas [1] |
Distance | 155.2 ± 0.7
ly (47.6 ± 0.2 pc) |
Absolute magnitude (MV) | +1.91 [4] |
Details | |
Mass | 1.76 [5] M☉ |
Radius | 2.74+0.11 −0.16 [1] R☉ |
Luminosity | 13.3±0.1 [1] L☉ |
Surface gravity (log g) | 3.66 [6] cgs |
Temperature | 6,848 [5] K |
Metallicity [Fe/H] | −0.12 [5] dex |
Rotational velocity (v sin i) | +140 [3] km/s |
Age | 1.4 [5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
λ Horologii, Latinised as Lambda Horologii, is a star in the southern constellation of Horologium. It is a yellow-white hued star that is dimly visible to the naked eye with an apparent visual magnitude of +5.35. [2] Based upon parallax, this object is located 155 light years distance from the Sun. It is drifting further away with a radial velocity of +28 km/s. [1] Although Eggleton and Tokovinin (2008) list this as a single star, [8] according to Kunzli and North (1998) it may be a binary system with a long orbital period. [9]
The visible component has a stellar classification of F2III, [3] matching an evolved star that has, at the age of 1.4 billion years, [5] become a giant. However, it has just 2.74 [1] times the Sun's radius and shows a high rate of spin with a projected rotational velocity of +140 km/s. [3] The star has 1.76 [5] times the mass of the Sun and is radiating 13 [1] times the Sun's luminosity from its photosphere at an effective temperature of 6,848 K. [5]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Horologium |
Right ascension | 02h 24m 53.91034s [1] |
Declination | −60° 18′ 43.0170″ [1] |
Apparent magnitude (V) | +5.35 [2] |
Characteristics | |
Spectral type | F2III [3] |
B−V color index | +0.39 [2] |
Astrometry | |
Radial velocity (Rv) | +28.34±0.41 [1] km/s |
Proper motion (μ) |
RA: −71.892
[1]
mas/
yr Dec.: −131.088 [1] mas/ yr |
Parallax (π) | 21.0119 ± 0.1004 mas [1] |
Distance | 155.2 ± 0.7
ly (47.6 ± 0.2 pc) |
Absolute magnitude (MV) | +1.91 [4] |
Details | |
Mass | 1.76 [5] M☉ |
Radius | 2.74+0.11 −0.16 [1] R☉ |
Luminosity | 13.3±0.1 [1] L☉ |
Surface gravity (log g) | 3.66 [6] cgs |
Temperature | 6,848 [5] K |
Metallicity [Fe/H] | −0.12 [5] dex |
Rotational velocity (v sin i) | +140 [3] km/s |
Age | 1.4 [5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
λ Horologii, Latinised as Lambda Horologii, is a star in the southern constellation of Horologium. It is a yellow-white hued star that is dimly visible to the naked eye with an apparent visual magnitude of +5.35. [2] Based upon parallax, this object is located 155 light years distance from the Sun. It is drifting further away with a radial velocity of +28 km/s. [1] Although Eggleton and Tokovinin (2008) list this as a single star, [8] according to Kunzli and North (1998) it may be a binary system with a long orbital period. [9]
The visible component has a stellar classification of F2III, [3] matching an evolved star that has, at the age of 1.4 billion years, [5] become a giant. However, it has just 2.74 [1] times the Sun's radius and shows a high rate of spin with a projected rotational velocity of +140 km/s. [3] The star has 1.76 [5] times the mass of the Sun and is radiating 13 [1] times the Sun's luminosity from its photosphere at an effective temperature of 6,848 K. [5]