V1291 Aquilae

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V1291 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 53m 18.736s[1]
Declination −03° 06′ 52.06″[1]
Apparent magnitude (V) 5.633
Characteristics
Spectral type A5pv
U−B color index 0.1
B−V color index 0.2
Variable type Alpha² CnV variable
Astrometry
Radial velocity (Rv) −20.4 km/s
Proper motion (μ) RA: 22.28 ± 0.36[1] mas/yr
Dec.: 14.20 ± 0.31[1] mas/yr
Parallax (π) 12.48 ± 0.36[1] mas
Distance 261 ± 8 ly
(80 ± 2 pc)
Absolute magnitude (MV) 5.839
Details
Mass 3.1 M
Radius 2.1 R
Luminosity 40 L
Temperature 7,500–10,000 K
Rotational velocity (v sin i) 2 km/s
Other designations
HIP 97871, SAO 143883, BD−03° 4742, GCRV 12231, HR 7575, HD 188041.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

V1291 Aquilae is a chemically peculiar variable star. Its period of variability is 223.826 days and this is also most likely the rotational period of the star.[2]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ Mikulásek, Z. et al. (2003). "Improved period of a slowly rotating cool magnetic CP star HD188041". Contributions of the Astronomical Observatory Skalnaté Pleso 33 (1): 29–37. Bibcode:2003CoSka..33...29M.