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Serpens (Ancient Greek: Ὄφις, romanized: Óphis, lit. 'the Serpent') is a constellation in the northern celestial hemisphere.One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations designated by the International Astronomical Union.
The brightest stars in Ophiuchus include α Ophiuchi, called Rasalhague ("head of the serpent charmer"), at magnitude 2.07, and η Ophiuchi, known as Sabik ("the preceding one"), at magnitude 2.43. [5] [6] Alpha Ophiuchi is composed of an A-type (bluish-white) giant star [7] and a K-type main sequence star. [8]
5 Serpentis is a wide binary star [9] system in Serpens Caput, the western section of the equatorial constellation of Serpens. It is faintly visible to the naked eye with an apparent visual magnitude of 5.10. [2] Based upon an annual parallax shift of 39.40 ± 0.29 mas [1] as viewed from Earth's orbit, it is located 83 light years away.
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]
Theta Serpentis (θ Serpentis, abbreviated Theta Ser, θ Ser) is a triple star system in the constellation of Serpens.. It consists of a binary pair designated Theta Serpentis AB and whose two components are designated Theta 1 Serpentis or Theta Serpentis A (officially named Alya / ˈ æ l i ə /, the traditional name for the entire system) [8] [9] and Theta 2 Serpentis or Theta Serpentis B ...
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The stellar classification of this star is F3V, [3] matching an F-type main-sequence star. It has 1.54 times the mass of the Sun [ 5 ] and is radiating 10 [ 2 ] times the Sun's luminosity from its photosphere at an effective temperature of 6,903 K. [ 5 ] The star has an estimated age of 1.9 billion years [ 5 ] and is spinning with a projected ...
6 Serpentis is a binary star [3] system in the constellation Serpens. It has a combined apparent visual magnitude of 5.382, [ 2 ] which is bright enough to be faintly visible to the naked eye. The distance to this system, based upon an annual parallax shift of 13.63 ± 0.73 mas , [ 1 ] is about 240 light years .