Theta Lyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 770 light years away from Earth. Theta Lyrae is an orange bright giant star of the spectral type K0II, meaning it possesses a surface temperature of about 5,000 kelvins, and is many times bigger and brighter, yet cooler, than our Sun. It is orbited by a subsystem composed of BD+37° 3399 and BD+37° 3399B. 10th magnitude BD+37° 3399 is a giant star with a spectral type of K2III.

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dbpprop:abstract
  • Theta Lyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 770 light years away from Earth. Theta Lyrae is an orange bright giant star of the spectral type K0II, meaning it possesses a surface temperature of about 5,000 kelvins, and is many times bigger and brighter, yet cooler, than our Sun. It is orbited by a subsystem composed of BD+37° 3399 and BD+37° 3399B. 10th magnitude BD+37° 3399 is a giant star with a spectral type of K2III. It is therefore almost the same temperature as Theta Lyrae, but smaller and dimmer. BD+37° 3399B is an 11th magnitude star of an unknown spectral type.
dbpprop:appmagV
  • 4.347 / 9.5 / 11.0
dbpprop:bV
  • +1.25 / ? / ?
dbpprop:class
  • K0II / K2III / ?
dbpprop:constell
dbpprop:dec
  • +38° 8' 1.431" / +38° 8' 35.80" / +38° 7' 1"
dbpprop:epoch
  • J2000.0
dbpprop:hasPhotoCollection
dbpprop:pError
  • 0.49 (xsd:double)
dbpprop:parallax
  • 4.24 (xsd:double)
dbpprop:propMoDec
  • 1.23 / 14.0 / ?
dbpprop:propMoRa
  • -0.49 / 0.0 / ?
dbpprop:ra
  • 19h 16m 22.0951s / 19h 16m 30.069s / 19h 16m 28.7s
dbpprop:radialV
  • -30.9 / ? / ?
dbpprop:uB
  • +1.23 / ? / ?
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rdfs:comment
  • Theta Lyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 770 light years away from Earth. Theta Lyrae is an orange bright giant star of the spectral type K0II, meaning it possesses a surface temperature of about 5,000 kelvins, and is many times bigger and brighter, yet cooler, than our Sun. It is orbited by a subsystem composed of BD+37° 3399 and BD+37° 3399B. 10th magnitude BD+37° 3399 is a giant star with a spectral type of K2III.
rdfs:label
  • Theta Lyrae
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