NR Vulpeculae

NR Vulpeculae
Observation data; Epoch J2000 Equinox J2000
Constellation	Vulpecula
Right ascension	19h 50m 11.9280s[1]
Declination	24° 55′ 24.1775″[1]
Apparent magnitude (V)	9.13 - 9.61[2]
Characteristics
Spectral type	M1Ia[2]
Variable type	LC[2]
Astrometry
Proper motion (μ)	RA: −2.320±0.073[1] mas/yr ; Dec.: −5.807±0.071[1] mas/yr
Parallax (π)	0.5633 ± 0.0516[1] mas
Distance	5,800 ± 500 ly ; (1,800 ± 200 pc)
Details
Radius	553[3] R☉
Luminosity	70,000 - 72,000[3] L☉
Temperature	Approx. 3,985±170[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 has an effective temperature around 4,000 K, a radius of 553 times larger than the sun, which means that if it were in the place of the Sun, its surface would reach beyond Mars's orbit. Consequently, NR Vulpeculae is also a luminous star, radiating 70,000 times as much energy as the sun.

References

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.
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.
Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158: 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd.

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[Gaia_DR2-1] 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.

[gcvs1-2] 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.

[messinio-3] Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158: 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd.