XO-3

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.[8]

This article is about the star. For the computer from the 'One Laptop Per Child' initiative, see OLPC XO-3.
XO-3
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis[1]
Right ascension  04h 21m 52.7053s[2]
Declination +57° 49′ 01.868″[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: –3.2 ± 0.6[5] mas/yr
Dec.: 3.2 ± 0.7[5] mas/yr
Parallax (π)4.96 ± 0.35[2] mas
Distance660 ± 50 ly
(200 ± 10 pc)
Details
Mass1.213 ± 0.066[6] M☉
Radius1.377 ± 0.083[6] R☉
Luminosity2.92+0.59
−0.48[6] L☉
Surface gravity (log g)4.244 ± 0.041[6] cgs
Temperature6429 ± 100[6] K
Metallicity [Fe/H]–0.177 ± 0.08[6] dex
Age2.82+0.58
−0.82[6] Gyr
Other designations
TYC 3727-1064-1, GSC 03727-01064, 2MASS J04215269+5749018[7]
Database references
SIMBADdata

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]

The XO-3 planetary system[6][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 — —
gollark: It works better on philosophers, since you can steal their wallet while they're distracted thinking about it.
gollark: They probably can't/won't eternally torture you, but there's a *possibility* of that infinite harm which is reduced by giving them £100, and if you accept the Pascal's Wager logic you should do that.
gollark: There's actually another similar thing, Pascal's *Mugging*, in which someone comes up to you and says "give me £100 or I will eternally torture you after you die".
gollark: But there are an infinitely large number of possible gods, and some do weirder things like "punish/reward entirely at random", "have no interest whatsoever in humanity", "punish people who believe in other gods", and all that, and Pascal's Wager just *ignores* those.
gollark: Pascal's Wager might work if the only options are "no god" or "one god, and it's the one you believe in, and they'll reward you if you believe and punish you otherwise".

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. Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.Gaia Data Release 1 catalog entry
  3. 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.
  4. Cutri; et al. (2003). "2MASS===04215269+5749018". 2MASS All-Sky Catalog of Point Sources. Retrieved 2012-02-25.
  5. Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal. 145 (2). 44. arXiv:1212.6182. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44.Vizier catalog entry
  6. 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.
  7. "SIMBAD query result: TYC 3727-1064-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2012-02-25.
  8. 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.
  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.
  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.
  • "XO-3". Exoplanets. Retrieved 2009-04-28.


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