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G 185-32

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G 185-32
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
Right ascension 19h 37m 13.68s[1]
Declination +27° 43′ 18.7″[1]
Apparent magnitude (V) 13.00[2]
Characteristics
Spectral type DA4.0[3]
B−V color index 0.17
Variable type ZZA[2]
Astrometry
Proper motion (μ) RA: 436[4] mas/yr
Dec.: 16[4] mas/yr
Parallax (π)54 ± 3 mas[5]
Distance60 ± 3 ly
(19 ± 1 pc)
Absolute magnitude (MV)11.66
Other designations
EGGR 277, LSPM J1937+2743, USNO-B1.0 1177-00513805, WD 1935+276, USNO 352, WD 1935+27, NLTT 48026, GJ 1241, PG 1935+276, PY Vulpeuclae.

G 185-32, also known by the variable star designation PY Vulpeculae, is a white dwarf in the constellation Vulpecula. Located approximately 19 parsecs (62 ly) distant,[5] the stellar remnant is a ZZ Ceti variable, varying by 0.02 apparent magnitudes from the mean of 13.00.[2]

References

  1. ^ a b Cutri, R. M.; Skrutskie, M. F.; van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". University of Massachusetts and Infrared Processing and Analysis Center. IPAC/California Institute of Technology. Bibcode:2003yCat.2246....0C.
  2. ^ a b c VSX (4 January 2010). "PY Vulpeculae". AAVSO Website. American Association of Variable Star Observers. Retrieved 19 October 2014.
  3. ^ Gianninas, A.; Bergeron, P.; Ruiz, M. T. (2011). "A Spectroscopic Survey and Analysis of Bright, Hydrogen-Rich White Dwarfs". The Astrophysical Journal. 743 (2): 138. arXiv:1109.3171. Bibcode:2011ApJ...743..138G. doi:10.1088/0004-637X/743/2/138.
  4. ^ a b Lépine, S. B.; Shara, M. M. (2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0."15 (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483. arXiv:astro-ph/0412070. Bibcode:2005AJ....129.1483L. doi:10.1086/427854.
  5. ^ a b Harrington, R. S.; Dahn, C. C. (1980). "Summary of U.S. Naval Observatory parallaxes". The Astronomical Journal. 85: 454. Bibcode:1980AJ.....85..454H. doi:10.1086/112696.


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