Wikipedia
XO-5
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]
| 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 | |
| Database references | |
| SIMBAD | data |
XO-5 has a suspected red dwarf companion with a temperature 3500+250
−150 K, on a wide orbit.[8]
Naming edit
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 edit
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]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Makropulos | 1.059 ± 0.028 MJ | 0.0488 ± 0.0006 | 4.1877545 ± 0.0000016 | 0[note 1] | — | — |
See also edit
Notes edit
References edit
- ^ 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
- ^ a b c d 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.
- ^ a b c d e 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.
- ^ Zacharias; et al. (2009). "3UC===259-099032". Third U.S. Naval Observatory CCD Astrograph Catalog. Retrieved 2012-02-21.
- ^ a b c Cutri; et al. (2003). "2MASS===07465196+3905404". 2MASS All-Sky Catalog of Point Sources. Retrieved 2012-02-20.
- ^ a b c d e f g h i j k 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.
- ^ "GSC 02959-00729". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-26.
- ^ 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
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- ^ 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.
- ^ 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.
External links edit
- . Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-04-28.