HD 210277

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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
Spectral type G0V
U−B color index 0.43
B−V color index 0.773
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
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
NLTT 53073, SAO 145906, BD-08° 5818, Gl 848.4, HIP 109378, GJ 9769, LTT 8887, GCRV 13920, PPM 206033
Database references
Extrasolar Planets
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[edit]

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]

The HD 210277 planetary system[8]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b >1.29 ± 0.11 MJ 1.138 ± 0.066 442.19 ± 0.50 0.476 ± 0.017

See also[edit]


  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ 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. 
  3. ^ Marcy; et al. (1998). "Two New Planets in Eccentric Orbits". The Astrophysical Journal. 520 (1): 239–247. arXiv:astro-ph/9904275Freely accessible. Bibcode:1999ApJ...520..239M. doi:10.1086/307451. 
  4. ^ 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. 
  5. ^ 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/0412265Freely accessible. Bibcode:2005ApJ...622.1160B. doi:10.1086/428115. 
  6. ^ 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. 
  7. ^ Caer McCabe; Carlotta Pham. "Catalog of withdrawn or refuted resolved Disks". Catalog of Resolved Circumstellar Disks. Retrieved 2010-04-03. 
  8. ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493Freely accessible. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. 

External links[edit]

Coordinates: Sky map 22h 09m 29.8657s, −07° 32′ 55.155″