2 Boötis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Bootes |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.63[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | K0 III[4] |
| B−V Template:Engvar | 1.009[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] km/s |
| Proper motion (μ) | RA: −17.353[1] mas/yr Dec.: −25.324[1] mas/yr |
| Parallax (π) | 9.6708±0.1033 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.57[2] |
| Details[5] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Rotational velocity (v sin i) | Script error: No such module "val". km/s |
| Age | Script error: No such module "val". Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
2 Boötis is a single[7] star in the northern constellation of Boötes,[6] located 337 light years away from the Sun.[1] It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 5.63.[2] This object is moving further from the Earth with a heliocentric radial velocity of +4 km/s.[1]
At the age of 1.33 billion years old,[5] this is an evolved giant star with a stellar classification of K0 III,[4] having exhausted the hydrogen at its core and expanded off the main sequence. It has 1.9 times the mass of the Sun with ten times the Sun's radius. The star is radiating 60 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,867 K.[5]
References
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- ↑ a b c d e f g h Template:Cite DR2
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ a b Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
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