XO-3
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis[1]
Right ascension 04h 21m 52.7048s[2]
Declination +57° 49′ 01.889″[2]
Apparent magnitude (V) 9.80 ± 0.03[3]
Characteristics
Spectral type F5V[3]
Apparent magnitude (B) 10.25 ± 0.03[3]
Apparent magnitude (V) 9.80 ± 0.03[3]
Apparent magnitude (J) 9.013 ± 0.029[4]
Apparent magnitude (H) 8.845 ± 0.018[4]
Apparent magnitude (K) 8.791 ± 0.019[4]
Astrometry
Proper motion (μ) RA: −2.721(27) mas/yr[2]
Dec.: 4.186(23) mas/yr[2]
Parallax (π)4.8687 ± 0.0261 mas[2]
Distance670 ± 4 ly
(205 ± 1 pc)
Details
Mass1.213 ± 0.066[5] M☉
Radius1.377 ± 0.083[5] R☉
Luminosity2.92+0.59
−0.48[5] L☉
Surface gravity (log g)4.244 ± 0.041[5] cgs
Temperature6429 ± 100[5] K
Metallicity [Fe/H]–0.177 ± 0.08[5] dex
Age2.82+0.58
−0.82[5] Gyr
Other designations
TYC 3727-1064-1, GSC 03727-01064, 2MASS J04215269+5749018[6]
Database references
SIMBADdata

XO-3 is a star in the constellation Camelopardalis. The star has a magnitude of 10 and is not visible to the naked eye but is visible through a small telescope.[3] A search for a binary companion star using adaptive optics at the MMT Observatory was negative.[7]

Planetary system

In 2007 the gas giant exoplanet XO-3b was discovered by the XO Telescope using the transit method. This object may be classed as brown dwarf because of its high mass.[3][8]

The XO-3 planetary system[5][9][10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 11.79 ± 0.59 MJ 0.0454 ± 0.00082 3.1915289 ± 0.0000032 0.2883 ± 0.0025 — —

See also

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
  2. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 6 Johns-Krull, Christopher M.; et al. (2008). "XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star". The Astrophysical Journal. 677 (1): 657–670. arXiv:0712.4283. Bibcode:2008ApJ...677..657J. doi:10.1086/528950. S2CID 15342571.
  4. 1 2 3 Cutri; et al. (2003). "2MASS===04215269+5749018". 2MASS All-Sky Catalog of Point Sources. Retrieved 2012-02-25.
  5. 1 2 3 4 5 6 7 8 Winn, Joshua N.; et al. (2008). "The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b". The Astrophysical Journal. 683 (2): 1076–1084. arXiv:0804.4475. Bibcode:2008ApJ...683.1076W. doi:10.1086/589737. S2CID 119266744.
  6. ↑ "SIMBAD query result: TYC 3727-1064-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2012-02-25.
  7. ↑ Adams, E. R.; et al. (2013). "Adaptive Optics Images. II. 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets". The Astronomical Journal. 146 (1). 9. arXiv:1305.6548. Bibcode:2013AJ....146....9A. doi:10.1088/0004-6256/146/1/9. S2CID 119117620.
  8. ↑ "XO-3b: Supersized planet or oasis in the 'brown dwarf desert'?" (Press release). Houston, Texas: Rice University. 2007-06-30. Retrieved 2022-01-01.
  9. ↑ Winn, Joshua N.; et al. (2009). "On the Spin-Orbit Misalignment of the XO-3 Exoplanetary System". The Astrophysical Journal. 700 (1): 302–308. arXiv:0902.3461. Bibcode:2009ApJ...700..302W. doi:10.1088/0004-637X/700/1/302. S2CID 2358804.
  10. ↑ Hirano, Teruyuki; et al. (2011). "Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation". Publications of the Astronomical Society of Japan. 63 (6): L57–L61. arXiv:1108.4493. Bibcode:2011PASJ...63L..57H. doi:10.1093/pasj/63.6.l57. S2CID 16909722.


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