V1401 Aquilae

V1401 Aquilae
Observation data; Epoch J2000 Equinox J2000
Constellation	Aquila
Right ascension	20h 05m 05.41390s
Declination	−11° 35′ 57.8808″
Apparent magnitude (V)	6.18 - 6.55[1]
Characteristics
Spectral type	F1III
B−V color index	0.52
Variable type	SRd[1]
Astrometry
Radial velocity (Rv)	−11.36[2] km/s
Proper motion (μ)	RA: −2.585[2] mas/yr ; Dec.: −15.629[2] mas/yr
Parallax (π)	1.3722 ± 0.0441 mas
Distance	2,380 ± 80 ly ; (730 ± 20 pc)
Details
Radius	35[2] R☉
Luminosity	1,309[2] L☉
Temperature	5,869[2] K
Other designations
	BD-12°5641, HD 190390, HIP 98910, HR 7671, SAO 163245
Database references
SIMBAD	data

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.[3] V1401 Aquilae was a latter designation of 64 Sagittarii.[4]

References

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.
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/0411493. Bibcode:2005A&A...432..595R. doi:10.1051/0004-6361:20042097. S2CID 1645692.
Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy. 18 (3): 209–223. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305. S2CID 118445625.

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[gcvs-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.

[3] 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/0411493. Bibcode:2005A&A...432..595R. doi:10.1051/0004-6361:20042097. S2CID 1645692.

[4] Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy. 18 (3): 209–223. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305. S2CID 118445625.