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HD 210277

HD 210277 is a 7th magnitude star in the constellation of Aquarius. It is a yellow dwarf star (spectral type G0V) like our Sun. It has a mass around 0.92 times that of our Sun and is estimated to be around 12 billion years old.[1] Since its distance is about 69 light years, it is not visible to the unaided eye. With binoculars it is easily visible.

The star has a massive extrasolar planet orbiting it.[2] 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 our 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.[3] However, observations with the Spitzer Space Telescope failed to detect any infrared excess at 70 micrometres or at 24 micrometres wavelengths.[4][5][6]

The HD 210277 system[7]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity
b >1.29 ± 0.11 MJ 1.138 ± 0.066 442.19 ± 0.50 0.476 ± 0.017

See also

* List of extrasolar planets


References

1. ^ Gonzalez et al.; Wallerstein, George; Saar, Steven H. (1999). "Parent Stars of Extrasolar Planets. IV. 14 Herculis, HD 187123, and HD 210277". The Astrophysical Journal Letters 511 (2): L111–L114. doi:10.1086/311847. http://www.iop.org/EJ/article/1538-4357/511/2/L111/985725.html.
2. ^ Marcy et al; Butler, R. Paul; Vogt, Steven S.; Fischer, Debra; Liu, Michael C. (1998). "Two New Planets in Eccentric Orbits". The Astrophysical Journal 520 (1): 239–247. doi:10.1086/307451. http://www.iop.org/EJ/article/0004-637X/520/1/239/39695.html.
3. ^ Trilling et al.; Brown, R. H.; Rivkin, A. S. (2000). "Circumstellar Dust Disks around Stars with Known Planetary Companions". The Astrophysical Journal 529 (1): 499–505. doi:10.1086/308280. http://www.iop.org/EJ/article/0004-637X/529/1/499/50369.html.
4. ^ 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. doi:10.1086/428115. Bibcode: 2005ApJ...622.1160B.
5. ^ 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. doi:10.1088/0004-637X/705/2/1226. Bibcode: 2009ApJ...705.1226B.
6. ^ Caer McCabe & Carlotta Pham. "Catalog of withdrawn or refuted resolved Disks". Catalog of Resolved Circumstellar Disks. http://circumstellardisks.org/cgi-bin/refuted_frame.pl. Retrieved 2010-04-03.
7. ^ Butler et al.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.

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