HD 210277
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 22h 09m 29.866s[1] |
Declination | −07° 32′ 55.15″[1] |
Apparent magnitude (V) | 6.63 |
Characteristics | |
Spectral type | G0V |
U−B color index | 0.43 |
B−V color index | 0.773 |
Astrometry | |
Radial velocity (Rv) | -24.1 km/s |
Proper motion (μ) | RA: 85.07 ± 0.46[1] mas/yr Dec.: -449.74 ± 0.30[1] mas/yr |
Parallax (π) | 46.38 ± 0.48 mas[1] |
Distance | 70.3 ± 0.7 ly (21.6 ± 0.2 pc) |
Absolute magnitude (MV) | 4.99 |
Details | |
Mass | 1.09 M☉ |
Radius | 1.1 ± 0.05 R☉ |
Luminosity | 1.2 L☉ |
Temperature | 5532 ± 14 K |
Metallicity | 0.19 ± 0.04 |
Age | 6.93 G years |
Other designations | |
Database references | |
SIMBAD | data |
ARICNS | data |
HD 210277 is a 7th magnitude star in the constellation of Aquarius. It is a yellow dwarf star (spectral type G0V) with a mass around 0.92 times that of our Sun.[2] Since its distance is about 70 light years,[1] it is not visible to the unaided eye. With binoculars it is easily visible.
The star has a extrasolar planet that has a minimum mass greater than Jupiters orbiting it in 442 days.[3] Claims were made in 1999 that a dust disk around the star HD 210277, similar to that produced by the Kuiper Belt had been imaged, lying between 30 and 62 AU from the star.[4] However, observations with the Spitzer Space Telescope failed to detect any infrared excess at 70 micrometres or at 24 micrometres wavelengths.[5][6]
Planetary system
The only known planet was discovered using 34 radial velocity measurements taken from 1996 to 1998 at W. M. Keck Observatory.[3]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | >1.29 ± 0.11 MJ | 1.138 ± 0.066 | 442.19 ± 0.50 | 0.476 ± 0.017 | — | — |
See also
References
- ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ^ Gonzalez; et al. (1999). "Parent Stars of Extrasolar Planets. IV. 14 Herculis, HD 187123, and HD 210277". The Astrophysical Journal Letters. 511 (2): L111–L114. Bibcode:1999ApJ...511L.111G. doi:10.1086/311847.
- ^ a b Marcy, Geoffrey W.; et al. (1999). "Two New Planets in Eccentric Orbits". The Astrophysical Journal. 520 (1): 239–247. arXiv:astro-ph/9904275. Bibcode:1999ApJ...520..239M. doi:10.1086/307451.
- ^ Trilling, D. E.; et al. (2000). "Circumstellar Dust Disks around Stars with Known Planetary Companions". The Astrophysical Journal. 529 (1): 499–505. Bibcode:2000ApJ...529..499T. doi:10.1086/308280.
- ^ Beichman, C. A.; et al. (2005). "Planets and Infrared Excesses: Preliminary Results from a Spitzer MIPS Survey of Solar-Type Stars". The Astrophysical Journal. 622 (2): 1160–1170. arXiv:astro-ph/0412265. Bibcode:2005ApJ...622.1160B. doi:10.1086/428115.
- ^ Bryden, G.; et al. (2009). "Planets and Debris Disks: Results from a Spitzer/MIPS Search for Infrared Excess". The Astrophysical Journal. 705 (2): 1226–1236. Bibcode:2009ApJ...705.1226B. doi:10.1088/0004-637X/705/2/1226.
- ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links