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[1] mas |
| 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 |
| Extrasolar Planets Encyclopaedia | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
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 massive extrasolar planet orbiting it.[3] Also, in 1999 the discovery of a circumstellar disk was announced by T. E. Trilling et al. based on observations in infrared wavelengths. The disk is probably similar to the Kuiper belt in the Solar System.
Planetary system and unconfirmed dust disk
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][7]
| 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
- 1 2 3 4 5 6 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.
- ↑ Marcy; et al. (1998). "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; 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.; Bryden, G.; Rieke, G. H.; Stansberry, J. A.; Trilling, D. E.; Stapelfeldt, K. R.; Werner, M. W.; Engelbracht, C. W.; Blaylock, M.; Gordon, K. D.; Chen, C. H.; Su, K. Y. L.; Hines, D. C. (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.; Beichman, C. A.; Carpenter, J. M.; Rieke, G. H.; Stapelfeldt, K. R.; Werner, M. W.; Tanner, A. M.; Lawler, S. M.; Wyatt, M. C.; Trilling, D. E.; Su, K. Y. L.; Blaylock, M.; Stansberry, J. A. (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.
- ↑ Caer McCabe & Carlotta Pham. "Catalog of withdrawn or refuted resolved Disks". Catalog of Resolved Circumstellar Disks. Retrieved 2010-04-03.
- ↑ 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
Coordinates: 
22h 09m 29.8657s, −07° 32′ 55.155″
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