Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Triangulum |
Right ascension | 02h 28m 48.49449s [1] |
Declination | +29° 55′ 54.3286″ [1] |
Apparent magnitude (V) | 5.89 [2] |
Characteristics | |
Spectral type | G0 V [2] |
U−B color index | +0.01 [3] |
B−V color index | +0.591±0.014 [2] |
Astrometry | |
Radial velocity (Rv) | +40.8 [4] km/s |
Proper motion (μ) |
RA: –66.071
[1]
mas/
yr Dec.: +71.499 [1] mas/ yr |
Parallax (π) | 31.7031 ± 0.1014 mas [1] |
Distance | 102.9 ± 0.3
ly (31.5 ± 0.1 pc) |
Absolute magnitude (MV) | 3.45 [5] |
Details | |
Mass | 1.10±0.03 [5] M☉ |
Radius | 1.86±0.03 [1] R☉ |
Luminosity | 3.72 [5] L☉ |
Temperature | 5,846 [5] K |
Metallicity [Fe/H] | −0.24 [6] dex |
Rotational velocity (v sin i) | 3 [7] km/s |
Age | 6.45 [5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
13 Trianguli is the Flamsteed designation for a star in the northern constellation of Triangulum. It has an apparent visual magnitude of 5.89, [2] so according to the Bortle scale it is faintly visible from dark suburban skies. The star is located at a distance of 103 light years from the Sun based on parallax measurements, [1] and is drifting further away with a radial velocity of +41 km/s. [4] It made a close approach to the Sun some 665,000 years ago at an estimated separation of 34.3 light-years. [2]
A stellar classification of G0 V [2] indicates this is a main sequence star that is generating energy by fusing hydrogen into helium at its core. It has about 110% of the Sun's mass, 186% of the Sun's radius, and shines with 3.72 times the luminosity of the Sun. The stellar atmosphere has an effective temperature of 5,846 K, [5] giving it the yellow hue of a G-type star. [8] It appears to be older than the Sun, with an estimated age of 6.45 billion years. [5]
In 1994, an astrometric companion was reported at an angular separation of 0.020″. However, follow-up observations reported in 2005 not only failed to recover this object but also returned a null result on a search for planetary companions. [9] The star has been examined for an infrared excess that could indicate the presence of an orbiting debris disk, but no such excess was found. [6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Triangulum |
Right ascension | 02h 28m 48.49449s [1] |
Declination | +29° 55′ 54.3286″ [1] |
Apparent magnitude (V) | 5.89 [2] |
Characteristics | |
Spectral type | G0 V [2] |
U−B color index | +0.01 [3] |
B−V color index | +0.591±0.014 [2] |
Astrometry | |
Radial velocity (Rv) | +40.8 [4] km/s |
Proper motion (μ) |
RA: –66.071
[1]
mas/
yr Dec.: +71.499 [1] mas/ yr |
Parallax (π) | 31.7031 ± 0.1014 mas [1] |
Distance | 102.9 ± 0.3
ly (31.5 ± 0.1 pc) |
Absolute magnitude (MV) | 3.45 [5] |
Details | |
Mass | 1.10±0.03 [5] M☉ |
Radius | 1.86±0.03 [1] R☉ |
Luminosity | 3.72 [5] L☉ |
Temperature | 5,846 [5] K |
Metallicity [Fe/H] | −0.24 [6] dex |
Rotational velocity (v sin i) | 3 [7] km/s |
Age | 6.45 [5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
13 Trianguli is the Flamsteed designation for a star in the northern constellation of Triangulum. It has an apparent visual magnitude of 5.89, [2] so according to the Bortle scale it is faintly visible from dark suburban skies. The star is located at a distance of 103 light years from the Sun based on parallax measurements, [1] and is drifting further away with a radial velocity of +41 km/s. [4] It made a close approach to the Sun some 665,000 years ago at an estimated separation of 34.3 light-years. [2]
A stellar classification of G0 V [2] indicates this is a main sequence star that is generating energy by fusing hydrogen into helium at its core. It has about 110% of the Sun's mass, 186% of the Sun's radius, and shines with 3.72 times the luminosity of the Sun. The stellar atmosphere has an effective temperature of 5,846 K, [5] giving it the yellow hue of a G-type star. [8] It appears to be older than the Sun, with an estimated age of 6.45 billion years. [5]
In 1994, an astrometric companion was reported at an angular separation of 0.020″. However, follow-up observations reported in 2005 not only failed to recover this object but also returned a null result on a search for planetary companions. [9] The star has been examined for an infrared excess that could indicate the presence of an orbiting debris disk, but no such excess was found. [6]