17 Lyrae

17 Lyrae A / 17 Lyrae B[1][2]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension 19h 07m 25.5807s
19h 07m 24.8s
Declination +32° 30′ 6.258″
+32° 30′ 06″
Apparent magnitude (V) 5.229 / 9.1
Characteristics
Spectral type F0V / ?
U−B color index +0.05 / ?
B−V color index +0.38 / ?
Astrometry
Radial velocity (Rv)4.0 / -12.88 km/s
Proper motion (μ) RA: 123.23 / ? mas/yr
Dec.: 32.08 / ? mas/yr
Parallax (π)24.64 ± 0.54 mas
Distance132 ± 3 ly
(40.6 ± 0.9 pc)
Other designations
17 Lyrae, HR 7261, BD+32°3326, HD 178449, SAO 67835, HIP 93917, GC 26340, GSC 02644-02411, CCDM J19075+3231, IDS 19036+3221
Database references
SIMBADdata

17 Lyrae is a binary star system in the constellation Lyra, approximately 132 light years away from Earth. The main star, 17 Lyrae A, is a 5th magnitude white star of the spectral type F0V, meaning it has a surface temperature of about 7,500 kelvins. It is a dwarf star, like the Sun, yet brighter and hotter.[1] Its companion, 17 Lyrae B, is a 9th magnitude star of an unknown spectral type.[2] There was once thought to be a third star in the system, 17 Lyrae C, until it was evident that the star's parallax and proper motions were too different for it to be part of the system.[3]


See also

References

  1. 1 2 "Simbad Query Result". Simbad. Retrieved October 15, 2007.
  2. 1 2 "Simbad Query Result". Simbad. Retrieved October 15, 2007.
  3. ↑ Slocum, Frederick (1929). "The parallax of 17 Lyrae C (abstract)". Popular Astronomy. 37: 328. Bibcode:1929PA.....37..328S.


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