V1401 Aquilae

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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 SRd[1]
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)
Other designations
BD-12° 5641, HD 190390, NSV 12766, HIP 98910, HR 7671, SAO 163245.
Database references

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.[2] V1401 Aquilae was a latter designation of 64 Sagittarii.[3]


  1. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S. 
  2. ^ Reyniers, M.; Cuypers, J. (2005). "The evolutionary status of the bright high-latitude supergiant HD 190390". Astronomy and Astrophysics. 432 (2): 595–608. arXiv:astro-ph/0411493Freely accessible. Bibcode:2005A&A...432..595R. doi:10.1051/0004-6361:20042097. 
  3. ^ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy. 18 (3): 209, 221. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305.