70 Aquarii

From Wikipedia, the free encyclopedia
Jump to: navigation, search
70 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 48m 30.21037s[1]
Declination –10° 33′ 19.7073″[1]
Apparent magnitude (V) 6.19[2]
Characteristics
Spectral type A9III–IV[3]
B−V color index +0.28[2]
Variable type Delta Scuti
Astrometry
Radial velocity (Rv) –5.8[4] km/s
Proper motion (μ) RA: +31.92[1] mas/yr
Dec.: +9.23[1] mas/yr
Parallax (π) 8.64 ± 0.83[1] mas
Distance 380 ± 40 ly
(120 ± 10 pc)
Absolute magnitude (MV) +0.88[5]
Details
Luminosity 38[5] L
Surface gravity (log g) 3.48[5] cgs
Temperature 7,294[5] K
Rotational velocity (v sin i) 110[6] km/s
Other designations
FM Aqr, BD–11 5923, FK5 3825, HD 215874, HIP 112615, HR 8676, SAO 165308.[7]

70 Aquarii is the Flamsteed designation for a star in the constellation equatorial constellation of Aquarius. It is a Delta Scuti-type variable with the variable star designation FM Aquarii.[5] The mean apparent visual magnitude of this star is 6.19[2] and it is around 380 light-years (120 parsecs) from Earth.[1]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (November 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. 
  2. ^ a b c Corben, P. M.; Stoy, R. H. (1968), Photoelectric Magnitudes and Colours for Bright Southern Stars, Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode:1968MNSSA..27...11C. 
  3. ^ Cowley, Anne; Fraquelli, Dorothy (February 1974), MK Spectral Types for Some Bright F Stars, Publications of the Astronomical Society of the Pacific 86 (509): 70, Bibcode:1974PASP...86...70C, doi:10.1086/129562. 
  4. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W. 
  5. ^ a b c d e Paunzen, E. et al. (September 2002), On the Period-Luminosity-Colour-Metallicity relation and the pulsational characteristics of lambda Bootis type stars, Astronomy and Astrophysics 392: 515–528, arXiv:astro-ph/0207494, Bibcode:2002A&A...392..515P, doi:10.1051/0004-6361:20020854 
  6. ^ Zorec, J. (October 2002), Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i, Astronomy and Astrophysics 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943. 
  7. ^ FM Aqr -- Variable Star of delta Sct type, SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-16. 

External links[edit]