70 Ophiuchi (star)

70 Ophiuchi A
Spectral	K0 V
Type	Main Sequence
Multiple	Binary
Luminosity	0.59 LSol
Absolute magnitude	5.5
Mag Terra	4.89
Temperature	5300° K
Mass	0.90 MSol
Radius	0.91 RSol
Companion	70 Ophiuchi B

70 Ophiuchi B
Spectral	K4 V
Type	Main Sequence
Multiple	Companion
Luminosity	0.13 LSol
Absolute magnitude	7.47
Mag Terra	7.15
Temperature	4350° K
Mass	0.70 MSol

The star 70 Ophiuchi is a binary system composed of two yellow-orange K-type main sequence dwarf stars.

Description (Specifications)

70 Ophiuchi A and B orbit each other in a highly elliptical orbit (e=0.499) at an average distance of 23.2AU, the separation varying between 11.4AU at periastron to 34.8AU at apastron, with an orbital period of 88.3 years.

• The inner edge of 70 Ophiuchi A's habitable zone is located around 0.56AU from the star, while the outer edge lies around 1.10AU. The distance from 70 Ophiuchi A where a Terra-normal world would be located is centered at about ~0.830AU, where a planet's period would be ~230 days.

• The inner edge of 70 Ophiuchi B's habitable zone is located at around 0.315AU from the star, while the outer edge lies farther out at ~0.617AU. The distance from 70 Ophiuchi B where a Terra-normal world would be located is centered at about ~0.466AU; such a planet would have an orbital period of about 146 days.

The 70 Ophiuchi star system lies approximately 5.1pc from Terra, and is located in a Coreward/Corespinward direction from Terra at bearing 029.9^o Galactic Longitude and +11.4^o North Galactic Latitude.

History & Background (Dossier)

No information currently available.

References & Contributors (Sources)

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• EXTERNAL LINK: Sol Station
• EXTERNAL LINK: SIMBAD @ University of Strasbourg
• EXTERNAL LINK: STARS (University of Illinois - Prof. Jim Kaler)
• Traveller Wiki Editorial Team
• Contributor: WHULorigan