V1331 Cygni
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 21h 01m 09.20684s[1] |
| Declination | +50° 21′ 44.8033″[1] |
| Apparent magnitude (V) | 11.99[2] |
| Characteristics | |
| Spectral type | G7-K0IV[3] |
| Astrometry | |
| Proper motion (μ) | RA: 0.980[1] mas/yr Dec.: −3.783[1] mas/yr |
| Parallax (π) | 1.6760 ± 0.0237 mas[1] |
| Distance | 1,950 ± 30 ly (597 ± 8 pc) |
| Details[3] | |
| Mass | 2.8 M☉ |
| Radius | 5 R☉ |
| Temperature | 5200 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
V1331 Cygni (also known as V1331 Cyg) is a young star in the constellation Cygnus. V1331 Cyg is located in the dark nebula LDN 981.[4]
V1331 Cygni is most noted for having an arc-like reflection nebula surrounding it. This circumstellar disc is a great birthplace for young stars, which form in the cloud.[5] V1331 Cygni is heavily obscured by dust, so the properties of the central star are hard to deduce; however, it is estimated to have a radius five times that of the Sun and a mass of 2.8 M☉.[3]
The General Catalog of Variable Stars classifies V1331 Cygni as an "INST" type variable, meaning a T Tauri star which shows rapid light variations.[7][8] Its visual band brightness varies from magnitude 13.08 to 10.58.[7] It is sometimes classified as a pre-FUOR star.[9] A semi-regular period of ~449 days has been reported.[9] Unlike many T Tauri stars, the mean brightness of V1331 Cygni remains nearly constant over long time periods.[10][6]
Gallery[edit]
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Dark nebula LDN 981 and V1331 Cygni (top center) by the Mount Lemmon SkyCenter
References[edit]
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Zacharias, N. (2012). "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". VizieR On-line Data Catalog. Bibcode:2012yCat.1322....0Z.
- ^ a b c Petrov, P. P.; Kurosawa, R.; Romanova, M. M.; Gameiro, J. F.; Fernandez, M.; Babina, E. V.; Artemenko, S. A. (2014). "Facing the wind of the pre-FUor V1331 Cyg". Monthly Notices of the Royal Astronomical Society. 442 (4): 3643. arXiv:1406.1660. Bibcode:2014MNRAS.442.3643P. doi:10.1093/mnras/stu1131.
- ^ "A young star takes centre stage". Hubble Space Telescope. Retrieved 10 May 2019.
- ^ Choudhary, A.; Stecklum, B.; Linz, Hendrik (2016). "Hubble imaging of V1331 Cygni: proper motion study of its circumstellar structures". Astronomy & Astrophysics. 590: A106. arXiv:1604.03667. Bibcode:2016A&A...590A.106C. doi:10.1051/0004-6361/201527547. S2CID 118448991.
- ^ a b Mel'nikov, S. Yu. (1997). "Quasi-periodic light variations in four Herbig Ae/Be stars". Pis'ma Astron. Zh. 23 (6): 799–810. Bibcode:1997AstL...23..799M. Retrieved 27 December 2021.
- ^ a b "V1331 Cyg". The International Variable Star Index. AAVSO. Retrieved 22 December 2021.
- ^ GCVSTypes. "GCVS Variability Types". GCVS. Sternberg Astronomical Institute. Retrieved 22 December 2021.
- ^ a b Hamilton, Joshua R. (June 2021). "Light Curve Analysis of 185 YSOs: New Periods Discovered for 9 Stars". JAAVSO. 49 (1): 49–57. Bibcode:2021JAVSO..49...49H. Retrieved 22 December 2021.
- ^ Ismailov, N. Z. (April 2005). "A new classification scheme for T Tauri light curves". Astronomy Reports. 49 (4): 309–315. Bibcode:2005ARep...49..309I. doi:10.1134/1.1898408. S2CID 122913721. Retrieved 22 December 2021.
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