Messier 40.
Estrella binaria óptica situada en la constelación de Ursa Major.
Coordenadas AR: 12h 22m 12,53s Dec: +58º04’58,60″
Magnitud aparente: +9,64
Identificador ngc: (no tiene ngc)
WIKIPEDIA:
Messier 40 (Conocida como Winnecke 4 o WNC 4) es una estrella binaria óptica que fue encontrada por Charles Messier cuando investigaba una nebulosa que erróneamente llegó a divulgar por el mismo observador Johannes Hevelius un siglo antes. Se encuentra en la constelación de Osa Mayor.
El consenso general es que se trata más de un sistema binario óptico que dos estrellas interactuando físicamente, en el espacio.
CRÉDITO IMÁGENES: Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS Web Site is http://www.sdss.org/. The SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions. The Participating Institutions are the American Museum of Natural History, Astrophysical Institute Potsdam, University of Basel, University of Cambridge, Case Western Reserve University, University of Chicago, Drexel University, Fermilab, the Institute for Advanced Study, the Japan Participation Group, Johns Hopkins University, the Joint Institute for Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, Ohio State University, University of Pittsburgh, University of Portsmouth, Princeton University, the United States Naval Observatory, and the University of Washington.
