Astronomy:UX Orionis
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Short description: Variable star in the constellation Orion
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 04m 29.9879s[2] |
| Declination | −03° 47′ 14.2867″[2] |
| Apparent magnitude (V) | 9.48 – 12.5[3] |
| Characteristics | |
| Spectral type | A3ea[3] |
| Astrometry | |
| Proper motion (μ) | RA: 1.056±0.028[2] mas/yr Dec.: -3.998±0.019[2] mas/yr |
| Parallax (π) | 3.1004 ± 0.0285[2] mas |
| Distance | 1,052 ± 10 ly (323 ± 3 pc) |
| Details | |
| Mass | 1.2[4] M☉ |
| Radius | 2.1[4] R☉ |
| Luminosity | 5.6[4] L☉ |
| Surface gravity (log g) | 3.86[4] cgs |
| Temperature | 6,136[4] K |
| Rotational velocity (v sin i) | 143[5] km/s |
| Age | 4.8[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
UX Orionis is a variable star in the constellation of Orion. It is a Herbig Ae star, located about 1000 light years from the Earth.[8] At its brightest it is a magnitude 9.5 object, so it is too faint to be seen with the naked eye.[3] UX Orionis is the prototype of the UX Orionis class of variable stars (often called "UXors"), which are young stellar objects that exhibit large (greater than 2.8 magnitude), irregular changes in visual band brightness.[9][3] UX Orionis was discovered by Henrietta Swan Leavitt.[3]
UX Orionis is surrounded by a circumstellar disk, and the star's photometric variability appears to be caused by episodes during which the star is obscured by dusty material within the circumstellar disk.[8]
References
- ↑ "ASAS All Star Catalogue". The All Sky Automated Survey. http://www.astrouw.edu.pl/asas/?page=aasc.
- ↑ 2.0 2.1 2.2 2.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 "UX Ori". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=23100.
- ↑ 4.0 4.1 4.2 4.3 4.4 Stassun, Keivan G. et al. (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
- ↑ Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G 3244. Bibcode: 2005yCat.3244....0G.
- ↑ Manoj, P. (2006). "Evolution of Emission-Line Activity in Intermediate-Mass Young Stars". The Astrophysical Journal 653 (1): 657–674. doi:10.1086/508764. Bibcode: 2006ApJ...653..657M.
- ↑ "UX Ori". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=UX+Ori.
- ↑ 8.0 8.1 Kreplin, A.; Madlener, D.; Chen, L.; Weigelt, G.; Kraus, S.; Grinin, V.; Tambovtseva, L.; Kishimoto, M. (May 2016). "Resolving the inner disk of UX Orionis". Astronomy and Astrophysics 590: A96. doi:10.1051/0004-6361/201628281. Bibcode: 2016A&A...590A..96K. https://ore.exeter.ac.uk/repository/bitstream/10871/130656/1/aa28281-16.pdf.
- ↑ Herbst, W.; Herbst, D. K.; Grossman, E. J.; Weinstein, D. (November 1994). "Catalogue of UBVRI Photometry of T Tauri Stars and Analysis of the Causes of Their Variability". Astronomical Journal 108: 1906. doi:10.1086/117204. Bibcode: 1994AJ....108.1906H.
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