V1401 Aquilae

From Wikipedia, the free encyclopedia
Jump to: navigation, search
V1401 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 20h 05m 05.41390s
Declination −11° 35′ 57.8808″
Apparent magnitude (V) 6.39
Spectral type F1III
B−V color index 0.52
Variable type type II Cepheid
Radial velocity (Rv) -12.1 ± 2 km/s
Proper motion (μ) RA: -2.19 ± 0.44 mas/yr
Dec.: -14.18 ± 0.43 mas/yr
Parallax (π) 2.56 ± 0.97 mas
Distance approx. 1,300 ly
(approx. 400 pc)
Absolute magnitude (MV) 6.88
Other designations
BD-12° 5641, HD 190390, NSV 12766, HIP 98910, HR 7671, SAO 163245.
Database references
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

V1401 Aquilae is semi-regular pulsating star in the constellation Aquila. Its evolutionary status is unclear, and it has been classified as a post-AGB object, a UU Herculis variable or belonging to the W Virginis variable subclass of the type II Cepheids. It has a low metallicity.[1] V1401 Aquilae was a latter designation of 64 Sagitarii.[2]


  1. ^ Reyniers, M.; Cuypers, J. (2005). "The evolutionary status of the bright high-latitude supergiant HD 190390". Astronomy and Astrophysics 432 (2): 595–608. Bibcode:2005A&A...432..595R. doi:10.1051/0004-6361:20042097. 
  2. ^ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy 18 (3): 209, 221. Bibcode:1987JHA....18..209W.