XO-3

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 52.7048s [2]
Declination	+57° 49′ 01.889″ [2]
Apparent magnitude  (V)	9.80 ± 0.03 [3]
Characteristics
Evolutionary stage	main sequence [2]
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
Radial velocity (Rv)	−11.14±0.47 [2] km/s
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]
Distance	670 ± 4  ly (205 ± 1  pc)
Details [5]
Mass	1.213±0.066  M☉
Radius	1.377±0.083  R☉
Luminosity	2.92+0.59 −0.48  L☉
Surface gravity (log g)	4.244±0.041  cgs
Temperature	6429±100  K
Metallicity [Fe/H]	−0.177±0.080  dex
Rotational velocity (v sin i)	18.54±0.17 km/s
Age	2.82+0.58 −0.82  Gyr
Other designations
XO-3, BD+57 793, TOI-1676, TIC 8400842, TYC 3727-1064-1, GSC 03727-01064, 2MASS J04215269+5749018 [6]
Database references
SIMBAD	data
Exoplanet Archive	data

XO-3 is a star 670 light-years (210 parsecs ) away 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 a brown dwarf because of its high mass, near the ~13  M_J limit for deuterium fusion. ^{[3] [8]} The planetary orbit is misaligned from the stellar rotation. ^{[9] [10]}

The XO-3 planetary system ^[11]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	11.70+0.42 −0.43  MJ	0.04539+0.00081 −0.00084	3.19153285(58)	0.27587+0.00071 −0.00067	84.20±0.54 °	1.217±0.073  RJ

References

1. Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
2. 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. 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. Cutri; et al. (2003). "2MASS===04215269+5749018". 2MASS All-Sky Catalog of Point Sources. Retrieved 2012-02-25.
5. 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.
11. Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics . 602: A107. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.

External links

• "XO-3". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-04-28.