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Binary Stars

A binary star is a stellar system consisting of two stars orbiting around their center of mass. For each star, the other is its companion star. Recent research suggests that a large percentage of stars are part of systems with at least two stars. Binary star systems are very important in astrophysics, because observing their mutual orbits allows their mass to be determined. The masses of many single stars can then be determined by extrapolations made from the observation of binaries. Thanks - Mcdonalds

Changes History - Objects

• Algol - 2009-01-16 18:10:29.0   -   [Create]   -   Noise   -   Approved
• Mira - 2009-01-16 18:06:30.0   -   [Create]   -   Noise   -   Approved
• JB 668-991 - 2007-06-12 20:02:19.0   -   [Create]   -   Jon   -   Approved
• ι Aps - 2007-02-05 00:15:01.0   -   [Create]   -   sergei   -   Approved
• ι Cnc - 2007-02-05 00:15:01.0   -   [Create]   -   sergei   -   Approved
• HD 92397 - 2007-02-05 00:14:29.0   -   [Create]   -   sergei   -   Approved
• HD 75289 - 2007-02-05 00:14:29.0   -   [Create]   -   sergei   -   Approved
• HD 80606 - 2007-02-05 00:14:29.0   -   [Create]   -   sergei   -   Approved
• HD 80607 - 2007-02-05 00:14:29.0   -   [Create]   -   sergei   -   Approved
• HD 117440 - 2007-02-05 00:14:28.0   -   [Create]   -   sergei   -   Approved
• HD 113703 - 2007-02-05 00:14:28.0   -   [Create]   -   sergei   -   Approved
• HD 73389 - 2007-02-05 00:14:28.0   -   [Create]   -   sergei   -   Approved
• HD 73390 - 2007-02-05 00:14:28.0   -   [Create]   -   sergei   -   Approved
• HD 38529 - 2007-02-05 00:14:28.0   -   [Create]   -   sergei   -   Approved
• Groombridge 1830 - 2007-02-05 00:13:29.0   -   [Create]   -   sergei   -   Approved
• Gliese 777 - 2007-02-05 00:13:18.0   -   [Create]   -   sergei   -   Approved
• Gliese 623 - 2007-02-05 00:13:08.0   -   [Create]   -   sergei   -   Approved
• Gliese 229 - 2007-02-05 00:12:49.0   -   [Create]   -   sergei   -   Approved
• γ Cae - 2007-02-05 00:12:31.0   -   [Create]   -   sergei   -   Approved
• γ Vir - 2007-02-05 00:11:59.0   -   [Create]   -   sergei   -   Approved
• γ Leo - 2007-02-05 00:11:59.0   -   [Create]   -   sergei   -   Approved
• γ Vol - 2007-02-05 00:11:59.0   -   [Create]   -   sergei   -   Approved
• γ Cep - 2007-02-05 00:11:58.0   -   [Create]   -   sergei   -   Approved
• γ Del - 2007-02-05 00:11:58.0   -   [Create]   -   sergei   -   Approved
• γ Cru - 2007-02-05 00:11:58.0   -   [Create]   -   sergei   -   Approved
• γ Cen - 2007-02-05 00:11:57.0   -   [Create]   -   sergei   -   Approved
• γ Ara - 2007-02-05 00:11:57.0   -   [Create]   -   sergei   -   Approved
• F Cen - 2007-02-05 00:09:56.0   -   [Create]   -   sergei   -   Approved
• η Ser - 2007-02-05 00:09:48.0   -   [Create]   -   sergei   -   Approved
• η Ori - 2007-02-05 00:09:48.0   -   [Create]   -   sergei   -   Approved
• η Oph - 2007-02-05 00:09:47.0   -   [Create]   -   sergei   -   Approved
• η Cas - 2007-02-05 00:09:47.0   -   [Create]   -   sergei   -   Approved
• η Cap - 2007-02-05 00:09:47.0   -   [Create]   -   sergei   -   Approved
• η CMi - 2007-02-05 00:09:47.0   -   [Create]   -   sergei   -   Approved
• η Car - 2007-02-05 00:09:47.0   -   [Create]   -   sergei   -   Approved
• η Ara - 2007-02-05 00:09:46.0   -   [Create]   -   sergei   -   Approved
• η Ant - 2007-02-05 00:09:46.0   -   [Create]   -   sergei   -   Approved
• ε TrA - 2007-02-05 00:07:53.0   -   [Create]   -   sergei   -   Approved
• ε CMa - 2007-02-05 00:07:52.0   -   [Create]   -   sergei   -   Approved
• ε Sgr - 2007-02-05 00:07:52.0   -   [Create]   -   sergei   -   Approved
• ε Tau - 2007-02-05 00:07:52.0   -   [Create]   -   sergei   -   Approved
• ε Ret - 2007-02-05 00:07:52.0   -   [Create]   -   sergei   -   Approved
• ε Tel - 2007-02-05 00:07:52.0   -   [Create]   -   sergei   -   Approved
• ε Tri - 2007-02-05 00:07:52.0   -   [Create]   -   sergei   -   Approved
• ε Boo - 2007-02-05 00:07:51.0   -   [Create]   -   sergei   -   Approved
• δ Vir - 2007-02-04 20:47:15.0   -   [Create]   -   sergei   -   Approved
• δ TrA - 2007-02-04 20:47:15.0   -   [Create]   -   sergei   -   Approved
• δ Tuc - 2007-02-04 20:47:15.0   -   [Create]   -   sergei   -   Approved
• δ Tau - 2007-02-04 20:47:15.0   -   [Create]   -   sergei   -   Approved
• δ Ori - 2007-02-04 20:47:14.0   -   [Create]   -   sergei   -   Approved
• δ Boo - 2007-02-04 20:47:14.0   -   [Create]   -   sergei   -   Approved
• δ Gem - 2007-02-04 20:47:14.0   -   [Create]   -   sergei   -   Approved
• D Cen - 2007-02-04 20:47:13.0   -   [Create]   -   sergei   -   Approved
• Cyg X-1 - 2007-02-04 20:44:57.0   -   [Create]   -   sergei   -   Approved
• χ Tau - 2007-02-04 20:44:55.0   -   [Create]   -   sergei   -   Approved
• α CVn - 2007-02-04 20:44:55.0   -   [Create]   -   sergei   -   Approved
• χ Dra - 2007-02-04 20:44:54.0   -   [Create]   -   sergei   -   Approved
• χ Sgr - 2007-02-04 20:44:54.0   -   [Create]   -   sergei   -   Approved
• HD 69863 - 2007-02-04 20:42:27.0   -   [Create]   -   sergei   -   Approved
• χ Aql - 2007-02-04 20:42:03.0   -   [Create]   -   sergei   -   Approved
• CS Cam - 2007-02-04 20:42:02.0   -   [Create]   -   sergei   -   Approved
• 55 Cnc - 2007-02-04 20:42:02.0   -   [Create]   -   sergei   -   Approved
• ο Cap - 2007-02-04 20:42:02.0   -   [Create]   -   sergei   -   Approved
• β Sgr - 2007-02-04 20:40:21.0   -   [Create]   -   sergei   -   Approved
• β TrA - 2007-02-04 20:40:04.0   -   [Create]   -   sergei   -   Approved
• β Sct - 2007-02-04 20:40:04.0   -   [Create]   -   sergei   -   Approved
• β Tuc - 2007-02-04 20:40:04.0   -   [Create]   -   sergei   -   Approved
• β Dra - 2007-02-04 20:40:00.0   -   [Create]   -   sergei   -   Approved
• β Lyr - 2007-02-04 20:40:00.0   -   [Create]   -   sergei   -   Approved
• β Del - 2007-02-04 20:40:00.0   -   [Create]   -   sergei   -   Approved
• β Cnc - 2007-02-04 20:39:59.0   -   [Create]   -   sergei   -   Approved
• β Aql - 2007-02-04 20:38:21.0   -   [Create]   -   sergei   -   Approved
• B Vel - 2007-02-04 20:37:17.0   -   [Create]   -   sergei   -   Approved
• Antares - 2007-02-04 20:36:46.0   -   [Create]   -   sergei   -   Approved
• α Com - 2007-02-04 20:35:11.0   -   [Create]   -   sergei   -   Approved
• α Cap - 2007-02-04 20:34:44.0   -   [Create]   -   sergei   -   Approved
• α Cru - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• α And - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• Albireo - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• α Del - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• α Cnc - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• α Lib - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• α Com - 2007-02-04 20:33:25.0   -   [Create]   -   sergei   -   Approved
• 83 Leo - 2007-02-04 20:33:24.0   -   [Create]   -   sergei   -   Approved
• 57 Cnc - 2007-02-04 20:30:59.0   -   [Create]   -   sergei   -   Approved
• 70 Oph - 2007-02-04 20:30:25.0   -   [Create]   -   sergei   -   Approved
• 61 Cyg - 2007-02-04 20:30:25.0   -   [Create]   -   sergei   -   Approved
• 41 Cap - 2007-02-04 20:30:24.0   -   [Create]   -   sergei   -   Approved
• 41 Ara - 2007-02-04 20:30:24.0   -   [Create]   -   sergei   -   Approved
• 47 Boo - 2007-02-04 20:30:24.0   -   [Create]   -   sergei   -   Approved
• 23 UMa - 2007-02-04 20:30:22.0   -   [Create]   -   sergei   -   Approved
• 25 CVn - 2007-02-04 20:30:22.0   -   [Create]   -   sergei   -   Approved
• 20 LMi - 2007-02-04 20:30:22.0   -   [Create]   -   sergei   -   Approved
• 3 Cen - 2007-02-04 20:30:22.0   -   [Create]   -   sergei   -   Approved
• 24 Cnc - 2007-02-04 20:30:22.0   -   [Create]   -   sergei   -   Approved
• 19 CVn - 2007-02-04 20:27:06.0   -   [Create]   -   sergei   -   Approved
• 16 Cyg - 2007-02-04 20:26:33.0   -   [Create]   -   sergei   -   Approved
• 101 Aqr - 2007-02-04 20:25:56.0   -   [Create]   -   sergei   -   Approved
• 15 Boo - 2007-02-04 20:25:56.0   -   [Create]   -   sergei   -   Approved
• 107 Aqr - 2007-02-04 20:25:56.0   -   [Create]   -   sergei   -   Approved
• α Com - 2007-02-04 20:23:44.0   -   [Create]   -   sergei   -   Approved