70 Ophiuchi
Encyclopedia : 7 : 70 : 70O : 70 Ophiuchi
|- style="vertical-align: top;" | B-V color index | |- style="vertical-align: top;" | U-B color index | |- style="vertical-align: top;" | Variable type |
|- ! style="background-color: #FFFFC0;" colspan="2" | Visual binary orbit |- style="vertical-align: top;" | Companion | Gl 702 B |- style="vertical-align: top;" | Period (P) | 88.3 years |- style="vertical-align: top;" | Semimajor axis (a) | 4.56" |- style="vertical-align: top;" | Eccentricity (e) | 0.495 |- style="vertical-align: top;" | Inclination (i) | 120.8° |- style="vertical-align: top;" | Node (Ω) | 13.2° |- style="vertical-align: top;" | Periastron epoch (T) | 301.4
|- ! style="background-color: #FFFFC0;" colspan="2" | Details |- |style="vertical-align: baseline;" | Mass | M☉ |- |style="vertical-align: baseline;" | Radius | R☉ |- |style="vertical-align: baseline;" | Luminosity | L☉ |- |style="vertical-align: baseline;" | Temperature | K |- |style="vertical-align: baseline;" | Metallicity | |- |style="vertical-align: baseline;" | Rotation | |- |style="vertical-align: baseline;" | Age | })<()or(}})=()and(}})<())}}} years
|- ! style="background-color: #FFFFC0;" colspan="2" | Other designations |- | colspan="2" |
The primary star is an orange main sequence dwarf of spectral type K1, and the secondary star is an orange main sequence dwarf of spectral type K5.
70 Ophuichi in fiction
In Frank Herbert's Dune series, Sikun is the third planet from 70 Ophuichi.
References
- W.D. Heintz, "The Binary Star 70 Ophiuchi Revisited", Journal of the Royal Astronomical Society of Canada, Vol. 82, No. 3, 1988.
External links
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