12 Boötis
Template:About-distinguish Template:Short description
Template:Location mark Location of 12 Boötis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.83[2] |
| Characteristics | |
| Spectral type | F9IVw[3] |
| U−B Template:Engvar | +0.07[2] |
| B−V Template:Engvar | +0.54[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: −23.43[1] mas/yr Dec.: −59.79[1] mas/yr |
| Parallax (π) | 27.917±0.044 mas[4] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 2.00[5] |
| Orbit[4] | |
| Primary | 12 Boo Aa |
| Companion | 12 Boo Ab |
| Period (P) | Script error: No such module "val". d |
| Semi-major axis (a) | Script error: No such module "val". mas |
| Eccentricity (e) | Script error: No such module "val". |
| Inclination (i) | Script error: No such module "val".° |
| Longitude of the node (Ω) | Script error: No such module "val".° |
| Periastron epoch (T) | Script error: No such module "val". |
| Argument of periastron (ω) (secondary) | Script error: No such module "val".° |
| Semi-amplitude (K1) (primary) | Script error: No such module "val". km/s |
| Semi-amplitude (K2) (secondary) | Script error: No such module "val". km/s |
| Details | |
| 12 Boo Aa | |
| Mass | Script error: No such module "val".[4] Template:Solar mass |
| Radius | 2.450[6] Template:Solar radius |
| Luminosity | 7.531 Template:Solar luminosity |
| Surface gravity (log g) | 3.73[5] cgs |
| Temperature | 6115[6] K |
| Metallicity [Fe/H] | −0.065[4] dex |
| 12 Boo Ab | |
| Mass | Script error: No such module "val".[4] Template:Solar mass |
| Radius | 1.901[6] Template:Solar radius |
| Luminosity | 4.692[6] Template:Solar luminosity |
| Temperature | 6200[6] K |
| Metallicity [Fe/H] | −0.065[6] dex |
| Other designations | |
| d Boötis, 12 Boötis, FK5 522, GC 19127, HIP 69226, HR 5304, HD 123999, GJ 9470, BD+25°2737, SAO 83203, WDS J14104+2506AB, CCDM 14104+2505 | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
12 Boötis is a spectroscopic binary[7] in the constellation Boötes. It is approximately 122 light years from Earth.[1]
12 Boötis is a yellow-white F-type subgiant with an apparent magnitude of +4.82. It is a spectroscopic binary pair which orbit around its centre of mass once every 9.6045 days,[3] with an estimated separation of 0.0035".[8] The two stars have similar masses around Template:Solar mass, both are slightly hotter than the Sun and about twice as large.[4]
A further companion, 12 Boötis B, was reported with a separation of approximately one arcsecond in 1989, but subsequent surveys have repeatedly failed to detect this companion.[3]
References
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- ↑ a b c d e Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b c d e f g Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b c d e f Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
Script error: No such module "Check for unknown parameters".