Iota Lyrae

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Iota Lyrae[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension 19h 7m 18.1291s
Declination +36° 6' 0.566"
Apparent magnitude (V) 5.249
Spectral type B6IV
U−B color index -0.51
B−V color index -0.11
Radial velocity (Rv) -18 km/s
Proper motion (μ) RA: -0.64 mas/yr
Dec.: -4.28 mas/yr
Parallax (π) 3.92 ± 0.52 mas
Distance approx. 800 ly
(approx. 260 pc)
Other designations
Iota Lyrae, 18 Lyrae, HR 7262, BD+35°3485, HD 178475, SAO 67834, HIP 93903, GC 26338, GSC 02652-01709

Iota Lyrae (ι Lyr) is a 5th magnitude star in the constellation Lyra, approximately 800 light years away from Earth. It is a bluish white subgiant star of the spectral type B6IV. It therefore possesses a surface temperature of 11,000 to 25,000 kelvins and is larger, brighter, and at least twice as hot in surface temperature as our Sun. It is a B[e] star, meaning it shows prominent forbidden emission lines of hydrogen in its spectrum.[1] It also rotates rapidly, at an uncertain 250 km/s.[2][not in citation given]


  1. ^ a b "Simbad Query Result". Simbad. Retrieved October 15, 2007. 
  2. ^ "Iota Lyrae". The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991). Retrieved October 15, 2007.