Theta Lyrae

Starbox begin
name=Theta Lyrae / BD+37° 3399 / BD+37° 3398Bcite web
title=Simbad Query Result | work=Simbad
url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%402924945&Name=*%20tet%20Lyr
accessdate=October 15
accessyear=2007] cite web
title=Simbad Query Result | work=Simbad
url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%402924947&Name=BD%2b37%20%203399
accessdate=October 15
accessyear=2007] cite web
title=Simbad Query Result | work=Simbad
url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%402924946&Name=BD%2b37%20%203398B
accessdate=October 15
accessyear=2007] Starbox observe
epoch=J2000.0
constell=Lyra
ra=19h 16m 22.0951s / 19h 16m 30.069s / 19h 16m 28.7s
dec=+38° 8' 1.431" / +38° 8' 35.80" / +38° 7' 1"
appmag_v=4.347 / 9.5 / 11.0Starbox character
class=K0II / K2III / ?
b-v=+1.25 / ? / ?
u-b=+1.23 / ? / ? |Starbox astrometry
radial_v=-30.9 / ? / ?
prop_mo_ra=-0.49 / 0.0 / ?
prop_mo_dec=1.23 / 14.0 / ?
parallax=4.24
p_error=0.49 |Starbox catalog
names=Theta Lyrae, 21 Lyrae, HR 7314, BD+37°3398, HD 180809, SAO 68065, HIP 94713, GC 26585, IDS 19129+3757, GSC 03121-02287, BD +37°3399, BD +37°3399B

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.

References