XO-5

Last updated
XO-5 / Absolutno
Observation data
Epoch J2000       Equinox J2000
Constellation Lynx [1]
Right ascension 07h 46m 51.9615s [2]
Declination +39° 05′ 40.461″ [2]
Apparent magnitude  (V)12.13 ± 0.03 [3]
Characteristics
Spectral type G8V [3]
Apparent magnitude  (V)12.13 ± 0.03 [3]
Apparent magnitude  (R)11.844 [4]
Apparent magnitude  (J)10.774 ± 0.019 [5]
Apparent magnitude  (H)10.443 ± 0.021 [5]
Apparent magnitude  (K)10.345 ± 0.018 [5]
Astrometry
Proper motion (μ)RA: −21.509(18)  mas/yr [2]
Dec.: −23.910(13)  mas/yr [2]
Parallax (π)3.6517 ± 0.0173  mas [2]
Distance 893 ± 4  ly
(274 ± 1  pc)
Absolute magnitude  (MV)5.06 ± 0.12 [6]
Details
Mass 0.88 ± 0.03 [6]   M☉
Radius 1.08 ± 0.04 [6]   R☉
Luminosity 0.88 ± 0.09 [6]   L☉
Surface gravity (log g)4.31 ± 0.03 [6]   cgs
Temperature 5370 ± 70 [6]   K
Metallicity [Fe/H]+0.05 ± 0.06 [6]   dex
Age 14.8 ± 2.0 [6]   Gyr
Other designations
Absolutno, GSC 02959-00729, UCAC2 45499774, 2MASS J07465196+3905404 [7]
Database references
SIMBAD data

XO-5 is a yellow dwarf main sequence star located approximately 893 light-years away from Earth in the Lynx constellation. It has a magnitude of about 12 and cannot be seen with the naked eye but is visible through a small telescope. [3] [6]

Contents

XO-5 has a suspected red dwarf companion with a temperature 3500+250
−150 K, on a wide orbit. [8]

Naming

The star XO-5 is named Absolutno. The name was selected in the NameExoWorlds campaign by the Czech Republic, during the 100th anniversary of the IAU. Absolutno is a fictional miraculous substance in the sci-fi novel Továrna na absolutno (The Factory for the Absolute). [9] [10]

Planetary system

The exoplanet XO-5b was discovered by the XO Telescope using the transit method in 2008. This planet is classified as a hot jupiter. [3] A search for transit timing variations caused by additional planets was negative. [11]

Size comparison of XO-5 b and Jupiter Exoplanet Comparison XO-5 b.png
Size comparison of XO-5 b and Jupiter
The XO-5 planetary system [6] [12]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b / Makropulos 1.059 ± 0.028  MJ 0.0488 ± 0.00064.1877545 ± 0.00000160 [note 1] ——

See also

Notes

  1. ↑ eccentricity is insignificant compared to its uncertainties [note 2]

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<span class="mw-page-title-main">XO-5b</span> Exoplanet in the constellation Lynx

XO-5b "Makropulos" is an extrasolar planet approximately 910 light years away in the constellation of Lynx. This planet was found by the transit method using the XO Telescope and announced in May 2008. It was also independently discovered by the HATNet Project. The planet has a mass and radius just slightly larger than that of Jupiter. This planet orbits very close to the G-type parent star, as it is typical for transiting planets, classing this as Hot Jupiter. It takes only 4.188 days to orbit at an orbital distance of 0.0488 AU).

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. A search for a binary companion star using adaptive optics at the MMT Observatory was negative.

XO-2 is a binary star system about 490 light-years away in the constellation Lynx. It consists of two components, XO-2N and XO-2S, both of which host planetary systems.

HAT-P-3, is a metal-rich K5 dwarf star located about 441 light-years away in the constellation Ursa Major. At a magnitude of about 11.5 it is not visible to the naked eye but is visible in a small to medium-sized amateur telescope. It is believed to be a relatively young star and has a slightly enhanced level of chromospheric activity.

XO-4 is a star located approximately 863 light-years away from Earth in the Lynx constellation. It has a magnitude of about 11 and cannot be seen with the naked eye but is visible through a small telescope. A search for a binary companion star using adaptive optics at MMT Observatory was negative.

WASP-19, formally named Wattle, is a magnitude 12.3 star about 869 light-years away, located in the Vela constellation of the southern hemisphere. This star has been found to host a transiting hot Jupiter-type planet in tight orbit.

<span class="mw-page-title-main">HAT-P-14b</span> Exoplanet in the constellation of Hercules

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HAT-P-17 is a K-type main-sequence star about 92.6 parsecs (302 ly) away. It has a mass of about 0.857 ± 0.039 M☉. It is the host of two planets, HAT-P-17b and HAT-P-17c, both discovered in 2010. A search for a binary companion star using adaptive optics at the MMT Observatory was negative. A candidate companion was detected by a spectroscopic search of high-resolution K band infrared spectra taken at the Keck observatory.

GSC 03949-00967 is a G-type main-sequence star about 1179 light-years away. It is older than the Sun, yet is enriched by heavy elements compared to the Sun, having 160% of solar abundance.

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 Burke, Christopher J.; et al. (2008). "XO-5b: A Transiting Jupiter-sized Planet with a 4 day Period". The Astrophysical Journal. 686 (2): 1331–1340. arXiv: 0805.2399 . Bibcode:2008ApJ...686.1331B. doi:10.1086/591497. S2CID   14043772.
  4. ↑ Zacharias; et al. (2009). "3UC===259-099032". Third U.S. Naval Observatory CCD Astrograph Catalog. Retrieved 2012-02-21.
  5. 1 2 3 Cutri; et al. (2003). "2MASS===07465196+3905404". 2MASS All-Sky Catalog of Point Sources. Retrieved 2012-02-20.
  6. 1 2 3 4 5 6 7 8 9 10 Pál, A.; et al. (2009). "Independent Confirmation and Refined Parameters of the Hot Jupiter XO-5b". The Astrophysical Journal. 700 (1): 783–790. arXiv: 0810.0260 . Bibcode:2009ApJ...700..783P. doi:10.1088/0004-637X/700/1/783. S2CID   18318327.
  7. ↑ "GSC 02959-00729". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2009-04-26.
  8. ↑ Piskorz, Danielle; Knutson, Heather A.; Ngo, Henry; Muirhead, Philip S.; Batygin, Konstantin; Crepp, Justin R.; Hinkley, Sasha; Morton, Timothy D. (2015), "Friends of Hot Jupiters. III. An Infrared Spectroscopic Search for Low-Mass Stellar Companions", The Astrophysical Journal, 814 (2): 148, arXiv: 1510.08062 , Bibcode:2015ApJ...814..148P, doi:10.1088/0004-637X/814/2/148, S2CID   11525988
  9. ↑ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  10. ↑ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  11. ↑ Maciejewski, G.; et al. (2011). "Refining Parameters of the XO-5 Planetary System with High-Precision Transit Photometry" (PDF). Acta Astronomica. 61 (1): 25–35. arXiv: 1103.1325 . Bibcode:2011AcA....61...25M.
  12. ↑ Sada, Pedro V.; et al. (2012). "Extrasolar Planet Transits Observed at Kitt Peak National Observatory". Publications of the Astronomical Society of the Pacific. 124 (913): 212–229. arXiv: 1202.2799 . Bibcode:2012PASP..124..212S. doi:10.1086/665043. S2CID   29665395.
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