Chi Boötis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.28[1] |
| Characteristics | |
| Spectral type | A2 V[3] |
| U−B Template:Engvar | +0.08[4] |
| B−V Template:Engvar | +0.02[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: −69.512 mas/yr[2] Dec.: +28.662 mas/yr[2] |
| Parallax (π) | 13.3668±0.0584 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +0.84[1] |
| Details | |
| Mass | 2.09[6] Template:Solar mass |
| Radius | 2.24[7] Template:Solar radius |
| Luminosity | 36.8[8] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[6] cgs |
| Temperature | Script error: No such module "val".[6] K |
| Rotational velocity (v sin i) | 84[6] km/s |
| Age | 340[6] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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Chi Boötis is a single,[10] white-hued star in the northern constellation Boötes, near the eastern constellation border with Corona Borealis. Its name is a Bayer designation that is Latinised from χ Boötis, and abbreviated Cho Boo or χ Boo. This star is faintly visible to the naked eye with an apparent visual magnitude of +5.3.[1] Based upon an annual parallax shift of Script error: No such module "val". as seen from the Earth, it is located approximately Script error: No such module "convert". from Earth. The star is moving closer to the Sun with a radial velocity of −16 km/s.[5]
This is an A-type main-sequence star with a stellar classification of A2 V,[3] which indicates it is generating energy via hydrogen fusion at its core. It is about 340[6] million years old with a projected rotational velocity of 84[6] km/s. The star has double the mass of the Sun,[6] 2.24 times the Sun's radius,[7] and is emitting 37[8] times the Sun's luminosity from its photosphere at an effective temperature of around Script error: No such module "val"..[6] It displays an infrared excess at an emission temperature of 65 K, indicating there is a circumstellar disk of dust orbiting the star at a distance of around Script error: No such module "val"..[7]
References
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- ↑ a b c d Template:Cite XHIP
- ↑ a b c d Template:Cite Gaia DR3
- ↑ a b Script error: No such module "citation/CS1".
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- ↑ a b c d e f g h i Script error: No such module "citation/CS1".
- ↑ a b c Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
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External links
- Script error: No such module "citation/CS1".