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XO-6

Jupiter compared to XO-6b
Discovery
Discovery site	Haleakalā Observatory in Maui, Hawaii
Discovery date	December 8th, 2016
Detection method	Transit
Orbital characteristics
Semi-major axis	0.0412±0.002 AU
Eccentricity	0.00 (fixed)
Orbital period (sidereal)	3.7649923+45 −46 d
Inclination	84.77°+0.82° −0.66°
Time of periastron	2,458,843.93943±0.00012 JD
Semi-amplitude	<450 m/s
Physical characteristics
Mean radius	2.17±0.20 RJ
Mass	1.73±0.20 MJ
Temperature	1,670±25 K

XO-6b is a transiting exoplanet, a hot Jupiter, orbiting the star XO-6 around 760 light years (230 parsecs) away from Earth. It was discovered in 2016 by the XO planet search team.

Physical properties

XO-6b is one of the puffiest planets ever discovered, with a maximum mass of 4.4 times of Jupiter. It is over twice as wide, making it one of the largest exoplanets ever found (see list of largest exoplanets). Later estimates, however, make it around two times the mass of Jupiter.

XO-6b has a tight orbit, which means a year on it is only about 4 days. XO-6 is slightly more than one-tenth as far from its host star as Mercury is to the sun.

XO-6

XO-6b orbits XO-6, a faint 10th magnitude star in the constellation Camelopardalis. Due to its magnitude, this star is too faint to be seen with the naked eye, but can be seen with a telescope. XO-6 is a F-type main-sequence star with about 1.5 times the mass of the Sun. It is also radiating 4 times as bright, and is almost twice the size of the Sun. It is also hotter, with a temperature of 6720 kelvins, which gives it the typical hue of an F-type star. Unlike most other stars of its kind, XO-6 rotates rapidly at a rate of 43 km/s.

References

1. ^ Crouzet, N.; et al. (2017). "Discovery of XO-6b: A Hot Jupiter Transiting a Fast Rotating F5 Star on an Oblique Orbit". The Astronomical Journal. 153 (3). 94. arXiv:1612.02776. Bibcode:2017AJ....153...94C. doi:10.3847/1538-3881/153/3/94. S2CID 119082666.
2. ^ Saha, Suman (2024-09-01). "Precise Transit Photometry Using TESS. II. Revisiting 28 Additional Transiting Systems with Updated Physical Properties". The Astrophysical Journal Supplement Series. 274 (1): 13. arXiv:2407.20846. Bibcode:2024ApJS..274...13S. doi:10.3847/1538-4365/ad6a60. ISSN 0067-0049.
3. ^ 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. S2CID 1828208.Gaia Data Release 1 catalog entry
4. ^ "The Extrasolar Planet Encyclopaedia — XO-6 b". Extrasolar Planets Encyclopaedia. 2016. Retrieved 2021-02-18.
5. "Find the constellation which contains given sky coordinates". djm.cc. Retrieved 2021-02-14.

Further reading

• Garai, Zoltán; et al. (January 2020). "Periodic transit timing variations and refined system parameters of the exoplanet XO-6b". Monthly Notices of the Royal Astronomical Society. 491 (2): 2760–2769. arXiv:1911.07054. Bibcode:2020MNRAS.491.2760G. doi:10.1093/mnras/stz3235.
• Ridden-Harper, Andrew; Turner, Jake D.; Jayawardhana, Ray (December 2020). "TESS Observations of the Hot Jupiter Exoplanet XO-6b: No Evidence of Transit Timing Variations". The Astronomical Journal. 160 (6): 249. arXiv:2009.10781. Bibcode:2020AJ....160..249R. doi:10.3847/1538-3881/abba1e. S2CID 221856652.

v t e Constellation of Camelopardalis
Camelopardalis in Chinese astronomy List of stars in Camelopardalis
Stars	Bayer α β γ Flamsteed 1 2 3 4 5 7 8 11 12 14 15 16 17 18 19 20 21 22 23 24 26 28 29 30 31 33 34 35 36 37 38 39 40 41 42 43 49 51 53 Variable U Z RU ST TX VZ BD BE BK BN CE CO CQ CS DD MY HR 967 1046 1073 1112 1124 1129 1138 1158 1192 1204 1205 1241 1242 1305 1313 1314 1327 1335 1342 1401 1440 1491 1527 1561 1624 1636 (Mago) 1675 1683 1686 1720 1844 1916 2209 2363 2396 2401 2527 2581 2830 3075 3082 3216 4062 4084 4609 (Tonatiuh) 4892 4893 5009 5091 5203 HD 35759 Other 2MASS J05325346+8246465 Gliese 445 NGC 2363-V1 PSR B0329+54 Stein 2051 Struve 1694 XO-3 XO-6
Exoplanets HD 32518 b HD 33564 b HD 104985 b XO-3b XO-6b
Star clusters NGC 1502
Nebulae IC 3568 (Lemon Slice Nebula) M4-18 NGC 1501 NGC 2404
Galaxies	NGC 1530 1560 1569 1573 1573A 1961 2146 2336 2363 2366 2403 2441 2460 2523 2655 2715 2748 5640 Other DDO 44 IC 342 IRAS 07598+6508 MACS0647-JD UGC 3478 UGC 3730 UGCA 86
Galaxy clusters MACS J0647.7+7015 MS 0735.6+7421
Astronomical events SN 1996ah GRB 970508 SN 2004dj SN 2010lt
Category

• Exoplanets discovered in 2016
• Transiting exoplanets
• Hot Jupiters
• Camelopardalis