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NR Vulpeculae
Observation dataEpoch J2000 Equinox J2000
Constellation
Vulpecula
Right ascension 19h 50m 11.9270s [ 1]
Declination
24° 55′ 24.183″[ 1]
Apparent magnitude (V)9.13 - 9.61[ 2]
Characteristics
Spectral type
M1Ia[ 2]
Variable type
LC [ 2]
Astrometry Proper motion (μ) RA: −1.435[ 1] mas /yr Dec.: −6.223[ 1] mas /yr Parallax (π)−0.08 ± 0.63 mas [ 1] Details Radius 980[ 3] R ☉ Luminosity 225,000[ 3] L ☉ Temperature 4,000[ 3] K Other designations NR Vulpeculae,
TYC 2144-1244-1,
GSC 02144-01244,
IRC +20438,
2MASS J19501193+2455240,
IRAS 19480+2447,
AAVSO 1946+24,
BD +24 3902,
HD 339034,
RAFGL 2462,
UCAC2 40577951
Database references SIMBAD data
NR Vulpeculae is a red supergiant and irregular variable star in the constellation Vulpecula . It is one of the largest known stars .
References
^ a b c d e Gaia Collaboration; Brown, A. G. A.; Vallenari, A.; Prusti, T.; De Bruijne, J. H. J.; Mignard, F.; Drimmel, R.; Babusiaux, C.; Bailer-Jones, C. A. L.; Bastian, U.; Biermann, M.; Evans, D. W.; Eyer, L.; Jansen, F.; Jordi, C.; Katz, D.; Klioner, S. A.; Lammers, U.; Lindegren, L.; Luri, X.; O'Mullane, W.; Panem, C.; Pourbaix, D.; Randich, S.; Sartoretti, P.; Siddiqui, H. I.; Soubiran, C.; Valette, V.; Van Leeuwen, F.; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy & Astrophysics . 595 : A2. Bibcode :2016A&A...595A...2G . doi :10.1051/0004-6361/201629512 . ^ a b c NR Vul, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars , Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 12, 2010.
^ a b c Levesque, Emily M. ; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (August 2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal . 628 (2): 973– 985. arXiv :astro-ph/0504337 Bibcode :2005ApJ...628..973L . doi :10.1086/430901 .
