Theta Lyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 760 light years away from Earth. Theta Lyrae is an orange bright giant star of the spectral type K0II, which means that it possesses a surface temperature of about 5,000 K, and is many times bigger and brighter, yet cooler, than the 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.[6] BD+37° 3399B is an 11th magnitude star of an unknown spectral type.[7]
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^ abcVallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.
Gaia DR3 record for this source at VizieR.
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ThetaLyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 760 light years away from Earth. ThetaLyrae is an orange...
Kappa Lyrae, a typical red giant around 73 parsecs distant. Similar bright orange or red giants include the 4th-magnitude ThetaLyrae, Lambda Lyrae, and...
Theta Arae and is 45000 light-years distant. It is an Oosterhoff type I cluster, and contains at least 69 variable stars, most of which are RR Lyrae variables:...
Iorio, Giuliano; Belokurov, Vasily (2021). "Chemo-kinematcs of the Gaia RR Lyrae: the halo and the disc". Monthly Notices of the Royal Astronomical Society...
population includes four Cepheids and RV Tauri variables, plus at least one RR Lyrae variable for which a period is known. Observations made during the ROSAT...
when rotation alone would make it a spheroid. An example of this is Beta Lyrae. Hydrostatic equilibrium is also important for the intracluster medium,...
the star's absorption of an accretion disc. Tau Canis Majoris is a Beta Lyrae-type eclipsing multiple star system that varies from magnitude 4.32 to 4...
variable stars. M62 is a globular cluster rich in variable stars such as RR Lyrae variables and has two generations of stars with different element abundances...
constellation also contains two cepheid variables visible to the naked eye. Theta Muscae is a triple star system, the brightest member of which is a Wolf–Rayet...
causes the system to vary by 0.03 magnitudes. Serpens Caput contains many RR Lyrae variables, although most are too faint to be seen without professional photography...
star system 3.25 Eta Serpentis Star 3.250 Gamma Lyrae Star 3.26 3.22 Gamma Hydri Star 3.26 3.25 Theta Ophiuchi Triple star system 3.27 3.24 PP Carinae...
University Press. p. 73. ISBN 978-0-521-85370-5. Horace A. Smith (2004). RR Lyrae Stars. Cambridge University Press. p. 79. ISBN 978-0-521-54817-5. M Reid;...
luminosities of giants there are several classes of pulsating variable stars: RR Lyrae variables, pulsating horizontal-branch class A (sometimes F) stars with...
(two) eyes of the lion'. Mu1 Scorpii is an eclipsing binary of the Beta Lyrae type. Discovered to be a spectroscopic binary by Solon Irving Bailey in...
beyond 50 parsecs and giant variable stars, including Cepheids and the RR Lyrae variables. The motion of the Sun through space provides a longer baseline...
designations mark them as variable stars. Examples include R Cygni, RR Lyrae, and V1331 Cygni. The International Astronomical Union delegates the task...
Aladfar al-ʼUẓfūr the Talons (of the Swooping Eagle) الأظفر أُظْفُور Eta Lyrae Alawaid al-ʽAwāʼidh the Protecting Mother Camels; the Old Camels; "the Four"...
Nelan, Edmund P. (2011-12-01). "Distance Scale Zero-Points from Galactic RR Lyrae Star Parallaxes". The Astronomical Journal. 142 (6): 187. arXiv:1109.5631...
cluster, and contains at least 69 variable stars, most of which are RR Lyrae variables. The planetary nebula IC 4699 is of 13th magnitude and lies midway...
other around four times as luminous. The system is classified as a Beta Lyrae variable, the apparent magnitude varying from 8.83 to 9.72 over 0.66 days...
Z.; Johnson, H. L. (1977-08-01). "Photoelectric UBV observations of RR Lyrae variable stars. Second list". Revista Mexicana de Astronomía y Astrofísica...
First Western Minister 織女一 Zhī Nǚ yī the First Star of Weaving Girl Alpha Lyrae Vega Lyra 織女 Zhī Nǚ Weaving Girl After the Qixi Festival Weaver Girl and...
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