Eta Ophiuchi

name=Eta Ophiuchi A/B }}

	Epoch	J2000
	Ra	17<sup>h</sup> 10<sup>m</sup> 227<sup>s</sup>
	Dec	-15&deg 43&prime 297&Prime
	Appmag V	243 (30/35)

	Class	A25 Va/A3 V
	B-v	005
	U-b	009

	Radial V	-24
	Prop Mo Ra	4116
	Prop Mo Dec	9765
	Parallax	3877
	P Error	086
	Dist Ly	841
	Dist Pc	2579

	Mass	23/20
	Radius	25/20
	Luminosity	35/21
	Temperature	8900/8600
	Metal
	Rotation	30 km/sec

Eta Ophiuchi (η Oph / η Ophiuchi) is a Star in the Constellation Ophiuchus . It also has the traditional name '''Sabik'''.

Sabik is actually a Binary star system that is difficult to resolve in amateur Telescopes but whose true nature has been determined through use of more advanced techniques. The "primary" star (whose observational data make up the table in this article), which could nominally be referred to as Sabik-A, is actually only slightly larger and warmer than its companion. Individually each star is a fairly unremarkable A class star, but as a binary pair they are unusual. Each star orbits around a common center in a very fast and highly elliptical Orbit , making Planetary Formation impossible in this system and some stellar data imprecise.

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Eta Ophiuchi

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