HD 175740

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HD 175740[1][2]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension 18h 54m 52.1771s / 18h 54m 51.5s
Declination +41° 36' 9.801" / +41° 36' 13"
Apparent magnitude (V) 5.465 / 12.6
Characteristics
Spectral type G8III / ?
U−B color index +1.03 / ?
B−V color index +1.035 / ?
Astrometry
Radial velocity (Rv) -8.7 / ? km/s
Proper motion (μ) RA: -1.37 / ? mas/yr
Dec.: -2.30 / ? mas/yr
Parallax (π) 12.19 ± 0.50 mas
Distance 270 ± 10 ly
(82 ± 3 pc)
Other designations
HD 175740, HR 7146, BD+41°3177, SAO 47909, HIP 92831
Database references
SIMBAD data

HD 175740, BD+41°3177B and BD+41° 3177C are components of a double star in the constellation Lyra, approximately 270 light years away from Earth. The most luminous star, 5th magnitude HD 175740, is a yellow giant star of the spectral type G8III. It therefore has a surface temperature of 5,000 to 6,000 kelvins, in the same range as that of our Sun, though it is much larger and brighter in comparison.[1] BD+41°3177B is a 13th magnitude star of an unknown spectral type.[2]

References[edit]

  1. ^ a b "Simbad Query Result". Simbad. Retrieved October 15, 2007. 
  2. ^ a b "Simbad Query Result". Simbad. Retrieved October 15, 2007.