HD 44780 is a star in the Henry Draper Catalogue. It is a spectroscopic binary star, located about 3° north of Mu Geminorum. It is composed of two giant stars, orbiting each other with a period of 577 days. This type of binary system is relatively rare.
- ^ a b c R.F. Griffin, "The spectroscopic orbits of HD 44780 and 65 Geminorum", Journal of the Royal Astronomical Society of Canada, April 1986, vol. 80, p. 91-108, ISSN 0035-872X , Bibcode: 1986JRASC..80...91G
- ^ a b c SIMBAD, "HD 44780 -- Spectroscopic binary" (accessed 2011-11-30)
- ^ a b c d Pourbaix, D.; Boffin, H. M. J. (February 2003), "Reprocessing the Hipparcos Intermediate Astrometric Data of spectroscopic binaries. II. Systems with a giant component", Astronomy and Astrophysics 398: 1163–1177, arXiv:astro-ph/0211483, Bibcode:2003A&A...398.1163P, doi:10.1051/0004-6361:20021736
- ^ VizieR, HD 044780 (accessed 2011-11-30)