13 Trianguli
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Triangulum |
| Right ascension | 02h 28m 48.49387s[1] |
| Declination | +29° 55′ 54.3315″[1] |
| Apparent magnitude (V) | 5.86[2] |
| Characteristics | |
| Spectral type | G0 V[1] |
| U−B color index | +0.01[2] |
| B−V color index | +0.58[2] |
| Astrometry | |
| Radial velocity (Rv) | +40.8[3] km/s |
| Proper motion (μ) | RA: –66.53[1] mas/yr Dec.: +71.93[1] mas/yr |
| Parallax (π) | 31.84 ± 0.40[1] mas |
| Distance | 102 ± 1 ly (31.4 ± 0.4 pc) |
| Absolute magnitude (MV) | 3.45[4] |
| Details | |
| Mass | 1.10 ± 0.03[4] M☉ |
| Luminosity | 3.72[4] L☉ |
| Temperature | 5,846[4] K |
| Metallicity [Fe/H] | –0.24[5] dex |
| Rotational velocity (v sin i) | 3[6] km/s |
| Age | 6.45[4] Gyr |
| Other designations | |
13 Trianguli is the Flamsteed designation for a star in the northern constellation of Triangulum. It has an apparent visual magnitude of 5.86,[2] so according to the Bortle scale it is faintly visible from dark suburban skies. Measurements made with the Hipparcos spacecraft show an annual parallax shift of 0.03184″,[1] which is equivalent to a distance of around 102 ly (31 pc) from the Sun.
A stellar classification of G0 V[1] 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 and shines with 3.72 times the luminosity of the Sun. The stellar atmosphere has an effective temperature of 5,846[4] K, giving it the yellow hue of a G-type star.[7] It appears to be older than the Sun, with an estimated age of 6.45 billion years.[4]
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.[8] 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.[5]
References
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- ↑ 2.0 2.1 2.2 2.3 2.4 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
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