18 Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 19m 16.2803s |
| Declination | +13° 00′ 15.476″ |
| Apparent magnitude (V) | 5.41[1] |
| Characteristics | |
| Spectral type | F5 IV[1] |
| U−B color index | –0.03 |
| B−V color index | 0.385[1] |
| R−I color index | 0.19 |
| Astrometry | |
| Radial velocity (Rv) | -3 km/s |
| Proper motion (μ) | RA: +105.91 mas/yr Dec.: –32.22 mas/yr |
| Parallax (π) | 38.33 ± 0.81 mas |
| Distance | 85 ± 2 ly (26.1 ± 0.6 pc) |
| Details | |
| Age | 300[1] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
18 Boötis is a star in the constellation Boötes about 85 light years away from Earth. Its apparent magnitude is 5.40. It is a subgiant of spectral type F5IV.
18 Boötis is believed to be a stream star member of the Ursa Major Moving Group.[citation needed]
References
- ^ a b c d Decin, G.; et al. (November 2003), "Age Dependence of the Vega Phenomenon: Observations", The Astrophysical Journal, 598 (1): 636–644, arXiv:astro-ph/0308294, Bibcode:2003ApJ...598..636D, doi:10.1086/378800
External links
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