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The Greek constellation of Hydra is an adaptation of a Babylonian constellation: the MUL.APIN includes a "serpent" constellation (MUL.DINGIR.MUŠ) that loosely corresponds to Hydra. It is one of two Babylonian "serpent" constellations (the other being the origin of the Greek Serpens), a mythological hybrid of serpent, lion and bird. [2]
HD 72659 is a star in the equatorial constellation of Hydra. With an apparent visual magnitude of 7.46, [2] his yellow-hued star is too faint to be viewed with the naked eye. Parallax measurements provide a distance estimate of 169.4 light years from the Sun, and it has an absolute magnitude of 3.98. [2]
TW Hydrae is a T Tauri star approximately 196 light-years away [1] in the constellation of Hydra (the Sea Serpent).TW Hydrae is about 80% of the mass of the Sun, but is only about 5-10 million years old.
Characteristics [ edit ] This globular cluster is located at a distance of 114,000 light-years (35,000 pc) from the Sun and 96,000 light-years (29,000 pc) from the Galactic Center [ 4 ] and is one of the oldest known globular clusters in the Milky Way Galaxy , forming nearly 12 billion years ago.
NGC 3200 is a large spiral galaxy located in the constellation Hydra. Its velocity relative to the cosmic microwave background is 3,877 ± 25 km/s, which corresponds to a Hubble distance of 57.2 ± 4.0 Mpc (~187 million ly). NGC 3200 was discovered by American astronomer Edward Singleton Holden in 1882. [1]
This is the list of notable stars in the constellation Hydra, sorted by decreasing brightness. Name B F G. Var HD HIP RA Dec vis. mag. abs. mag. Dist. Sp. class Notes
HD 76151 is a high proper motion, G-type main-sequence star and solar analog [3] in the constellation of Hydra 54.95 light-years from Earth. [1] It has an apparent visual magnitude of approximately 6.00, which means it is faintly visible to the naked eye under good viewing conditions. [2]
Beta Hydrae, Latinized from β Hydrae, is a double star in the equatorial constellation of Hydra. [14] Historically, Beta Hydrae was designated 28 Crateris, but the latter fell out of use when the IAU defined the permanent constellation boundaries in 1930. [15]