Omicron Draconis, 47 Draconis, HR 7125, HD 175306, HIP 92512, BD+59°1925
Database references
SIMBAD
data
Omicron Draconis (Latinised as ο Draconis, abbreviated to ο Dra) is a giant star in the constellation Draco located 322.93 light years from the Earth. Its path in the night sky is circumpolar for latitudes greater than 31o north, meaning the star never rises or sets when viewed in the night sky.
This is a single-lined spectroscopic binary system,[7] but the secondary has been detected using interferometry. It is an RS Canum Venaticorum variable system with eclipses. The total amplitude of variation is only a few hundredths of a magnitude.[8][4] The secondary star is similar to the Sun, presumably a main sequence star, while the primary is a giant star 25 times larger than the Sun and two hundred times more luminous.
^ abcdeVan Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ abHoffleit, Dorrit; Jaschek, Carlos (1991). "The Bright star catalogue". New Haven. Bibcode:1991bsc..book.....H.
^ abKeenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
^ abcdefghijklmnopRoettenbacher, Rachael M.; Monnier, John D.; Fekel, Francis C.; Henry, Gregory W.; Korhonen, Heidi; Latham, David W.; Muterspaugh, Matthew W.; Williamson, Michael H.; Baron, Fabien; Ten Brummelaar, Theo A.; Che, Xiao; Harmon, Robert O.; Schaefer, Gail H.; Scott, Nicholas J.; Sturmann, Judit; Sturmann, Laszlo; Turner, Nils H. (2015). "Detecting the Companions and Ellipsoidal Variations of RS CVn Primaries. II. O Draconis, a Candidate for Recent Low-mass Companion Ingestion". The Astrophysical Journal. 809 (2): 159. arXiv:1507.03601. Bibcode:2015ApJ...809..159R. doi:10.1088/0004-637X/809/2/159. S2CID 119228345.
^Karataș, Yüksel; Bilir, Selçuk; Eker, Zeki; Demircan, Osman; Liebert, James; Hawley, Suzanne L.; Fraser, Oliver J.; Covey, Kevin R.; Lowrance, Patrick; Kirkpatrick, J. Davy; Burgasser, Adam J. (2004). "Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution". Monthly Notices of the Royal Astronomical Society. 349 (3): 1069–1092. arXiv:astro-ph/0404219. Bibcode:2004MNRAS.349.1069K. doi:10.1111/j.1365-2966.2004.07588.x. S2CID 15290475.
^ abCite error: The named reference BohmVitense2000 was invoked but never defined (see the help page).
^ abCite error: The named reference aaa398_1163 was invoked but never defined (see the help page).
^Cite error: The named reference IVSI was invoked but never defined (see the help page).
OmicronDraconis (Latinised as ο Draconis, abbreviated to ο Dra) is a giant star in the constellation Draco located 322.93 light years from the Earth...
Alpha Pictoris is the south pole star of Mercury while OmicronDraconis is its north star. 42 Draconis is the closest star to the north pole of Venus. Eta1...
magnitude 3.2 star. It is fainter than Earth's Polaris (α Ursae Minoris). OmicronDraconis is its north star. After the Sun, the second-brightest object in the...
Pictoris, a magnitude 3.2 star. It is fainter than Earth's Polaris. OmicronDraconis is its north star. Furthermore, the Sun is so bright that it is still...
la sixième grandeur. Nebula between the stars Omicron Boötis and Iota Draconis: it is very faint; near it is a star of 6th magnitude. — Charles Messier...
79: 819. Bibcode:1974AJ.....79..819H. doi:10.1086/111614. "40 Eridani 3 (Omicron² Eridani)". solstation.com. Archived from the original on 30 September...
Cygni Star Suspected variable star 2.23 Alpha Cassiopeiae Star 2.230 Gamma Draconis Star 2.24 2.21 Alpha Coronae Borealis Binary star system 2.25 2.24 Zeta...
as delta, epsilon, zeta and nu. He added pi and rho, not using xi and omicron as Bayer used these letters to denote Cygnus and Hercules on his map. The...
is evolving to become a red giant. The star was once thought to be a BY Draconis variable with the variable star designation MQ Ser, but has been found...
variable star was identified in 1638 when Johannes Holwarda noticed that Omicron Ceti (later named Mira) pulsated in a cycle taking 11 months; the star...
Protocol Psi Draconis Dziban Draco A single-star asterism in the Purple Forbidden enclosure. 柱史 Zhù Shǐ Official of Royal Archives Phi Draconis 钺 Yuè Battle...