XO-1
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Corona Borealis[1] |
| Right ascension | 16h 02m 11.847s[2] |
| Declination | +28° 10′ 10.44″[2] |
| Apparent magnitude (V) | 11.19 ± 0.03[3] |
| Characteristics | |
| Spectral type | G1V[3] |
| Apparent magnitude (B) | 11.85 ± 0.04[3] |
| Apparent magnitude (V) | 11.19 ± 0.03[3] |
| Apparent magnitude (J) | 9.939 ± 0.022[4] |
| Apparent magnitude (H) | 9.601 ± 0.017[4] |
| Apparent magnitude (K) | 9.527 ± 0.015[4] |
| Variable type | Planetary transit variable[3] |
| Astrometry | |
| Proper motion (μ) | RA: –17.9 ± 0.7[2] mas/yr Dec.: 15.2 ± 0.6[2] mas/yr |
| Distance | 561 ± 39[5] ly (172 ± 12[5] pc) |
| Absolute magnitude (MV) | 5.02+0.14 −0.16[5] |
| Details | |
| Mass | 1.027+0.057 −0.061[5] M☉ |
| Radius | 0.94 ± 0.02[6] R☉ |
| Luminosity | 0.86+0.12 −0.10[5] L☉ |
| Surface gravity (log g) | 4.50 ± 0.01[7] cgs |
| Temperature | 5738 ± 65[7] K |
| Metallicity [Fe/H] | –0.06 ± 0.07[7] dex |
| Rotational velocity (v sin i) | 1.1 ± 1.0[7] km/s |
| Age | 1.0+3.1 −0.9[5] Gyr |
| Other designations | |
XO-1 is a magnitude 11 yellow dwarf star located approximately 560 light-years away[5] in the constellation Corona Borealis. XO-1 has a mass and radius similar to the Sun. In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope.[3]
Planetary system
The XO Project is an international team of professional and amateur astronomers which discovered the Jupiter-sized planet orbiting around XO-1. The team, led by Peter McCullough of the Space Telescope Science Institute in Baltimore, includes four amateur astronomers from North America and Europe. The planet was confirmed using the Harlan J. Smith Telescope and Hobby-Eberly Telescope at McDonald Observatory of the University of Texas.[3] An independent confirmation of the planet was made by the SuperWASP project.[9]
Further observations with the NICMOS instrument on board the Hubble Space Telescope detected the presence of water vapor, methane, and carbon dioxide in the atmosphere of XO-1b.[10] However an independent reinvestigation of the same data was unable to reproduce these results.[11]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| XO-1b | 0.92 ± 0.08 MJ | 0.049 ± 0.001 | 3.94150685 ± 0.00000091 | 0(assumed) [note 1] | — | — |
See also
- List of transiting extrasolar planets
Notes
- ↑ eccentricity approximately equal to zero is expected theoretically and is consistent with the radial velocities<ref name="McCullough2006"/>
References
- ↑ Roman (1987). "Constellation boundaries". Identification of a Constellation From Position. Retrieved 2012-01-05.
- ↑ 2.0 2.1 2.2 2.3 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
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 McCullough, P. R. et al. (2006). "A Transiting Planet of a Sun-like Star". The Astrophysical Journal 648 (2): 1228–1238. arXiv:astro-ph/0605414. Bibcode:2006ApJ...648.1228M. doi:10.1086/505651.
- ↑ 4.0 4.1 4.2 Skrutskie, M. F. et al. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.Vizier catalog entry
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Torres, Guillermo et al. (2008). "Improved Parameters for Extrasolar Transiting Planets". The Astrophysical Journal 677 (2): 1324–1342. arXiv:0801.1841. Bibcode:2008ApJ...677.1324T. doi:10.1086/529429.
- ↑ 6.0 6.1 Burke, Christopher J. et al. (2010). "NICMOS Observations of the Transiting Hot Jupiter XO-1b". The Astrophysical Journal 719 (2): 1796–1806. arXiv:1006.1953. Bibcode:2010ApJ...719.1796B. doi:10.1088/0004-637X/719/2/1796.
- ↑ 7.0 7.1 7.2 7.3 Torres, Guillermo et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal 757 (2). 161. arXiv:1208.1268. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
- ↑ "SIMBAD query result: TYC 2041-1657-1 -- Variable Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
- ↑ Wilson, D. M. et al. (2006). "SuperWASP Observations of the Transiting Extrasolar Planet XO-1b". The Publications of the Astronomical Society of the Pacific 118 (847): 1245–1251. arXiv:astro-ph/0607591. Bibcode:2006PASP..118.1245W. doi:10.1086/507957.
- ↑ Tinetti, G. et al. (2010). "Probing the Terminator Region Atmosphere of the Hot-Jupiter XO-1b with Transmission Spectroscopy". The Astrophysical Journal Letters 712 (2): L139–L142. arXiv:1002.2434. Bibcode:2010ApJ...712L.139T. doi:10.1088/2041-8205/712/2/L139.
- ↑ Gibson, N. P. et al. (2011). "A new look at NICMOS transmission spectroscopy of HD 189733, GJ-436 and XO-1: no conclusive evidence for molecular features". Monthly Notices of the Royal Astronomical Society 411 (4): 2199–2213. arXiv:1010.1753. Bibcode:2011MNRAS.411.2199G. doi:10.1111/j.1365-2966.2010.17837.x.
External links
- SpaceDaily: Astronomers Catch Planet By Unusual Means (May 19, 2006)
- "XO-1". Exoplanets. Retrieved 2009-04-28.
Coordinates: 
16h 02m 12s, +28° 10′ 11″
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