It bore the traditional name Algorab derived from Arabicالغرابal-ghuraab, meaning 'the crow'. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[10] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[11] included a table of the first two batches of names approved by the WGSN; which included Algorab for this star.
Delta Corvi has more than 2.7 times the mass of the Sun, which is causing it to radiate a much higher energy output—roughly 69 times the Sun's luminosity. The effective temperature of the outer atmosphere is 10,400 K,[6] giving it the white hue of an A-type star.[14] The spectrum matches a stellar classification of A0 IV(n) kB9.[3] However, it is more luminous—65 to 70 times that of the Sun—than it would be if it were on the main sequence. Hence it is either a subgiant star around 260 million years old that has nearly exhausted the supply of hydrogen at its core and is in the process of evolving away from the main sequence of stars like the Sun, or a pre-main-sequence star around 3.2 million years old that has not completely condensed and settled on the main sequence.[6]
In 1823, Delta Corvi was found to be a wide double star by British astronomers James South and John Herschel. Since that time, the position of the two stars with respect to each other has not changed.[15] The magnitude 9.3 companion, HR 4757 B, with a classification of K2Ve, is at an angular separation of 24.2 arcseconds along a position angle of 214°.[15][16] Although the two stars share a common proper motion,[16] the significant differences in their estimated ages suggests that they may not be physically connected.[6]
A 2006 study found that Delta Corvi displayed no excess infrared emission that would otherwise suggest the presence of circumstellar matter;[17] however, warm interstellar dust was detected in a 2014 study.[18]
^ abcGutierrez-Moreno, Adelina; et al. (1966), "A System of photometric standards", Publications of the Department of Astronomy University of Chile, 1, Publicaciones Universidad de Chile, Department de Astronomy: 1–17, Bibcode:1966PDAUC...1....1G
^Ertel, S.; Absil, O.; Defrère, D.; Le Bouquin, J.-B.; Augereau, J.-C.; Marion, L.; Blind, N.; Bonsor, A.; Bryden, G.; Lebreton, J.; Milli, J. (2014). "A near-infrared interferometric survey of debris-disk stars. IV. An unbiased sample of 92 southern stars observed in H band with VLTI/PIONIER". Astronomy & Astrophysics. 570: 20. arXiv:1409.6143. Bibcode:2014A&A...570A.128E. doi:10.1051/0004-6361/201424438. S2CID9594917. A128.
Delta Delta Delta Delta Delta II River delta Delta wing Delta III Delta IV Ganges Delta Delta (rocket family) List of Delta Delta Delta chapters Kronecker delta Yangtze Delta Delta Air Lines Nile Delta Delta Works Delta Connection Lancia Delta Delta (letter) Delta Sigma Delta Delta Goodrem Gnome Delta Delta Queen Nemunas Delta Mekong Delta Delta ray Delta wave Danube Delta Delta-v Delta-class submarine Delta State Delta, Utah Niger Delta Orinoco Delta Delta-sigma modulation Mississippi Delta Dyke Delta List of Delta Tau Delta members Delta neutral Dirac delta function Irrawaddy Delta Delta, Br…
itish Columbia Delta Sigma Theta Yukon–Kuskokwim Delta Mississippi River Delta Delta encoding Indus River Delta Okavango Delta Delta Upsilon Operation Delta Force Delta Green STC Delta Conflict in the Niger Delta Camp Delta – Delta Resort Delta Force List of Delta Tau Delta chapters Phi Delta Delta Delta Kappa Delta Delta potential Delta Electronics History of Delta Air Lines Ebro Delta Pearl River Delta Inner Niger Delta The Delta Force Delta Lloyd Group Delta Tau Delta Delta Flight Museum Volga Delta Delta (Delta Goodrem album) Hovey Delta Bird Thor-Delta Delta, Colorado Delta IV Heavy Paraná Delta Isotta Fraschini Delta List of Thor and Delta launches Delta Private Jets Red River Delta Sacramento–San Joaquin River Delta Hurricane Delta Trigonopeltastes delta Delta class North Delta Delta King Delta Ethniki Delta (company) Delta Air Lines–Northwest Airlines merger Peace–Athabasca Delta Delta Theta Phi Delta Amacuro Delta Force (video game) Llobregat Delta Delta formation Rhine–Meuse–Scheldt delta Delta Psi Delta Colorado River Delta Southern Delta Aquariids Delta City Delta Reservoir Delta Chi Arkansas Delta Delta Conveyance Project Delta Cafe Mississippi Delta Com