70 Ophiuchi

70 Ophiuchi AB

Fact

A double star, it is located about 16.6 ly away in the northeastern part of the constellation Ophiuchus. 70 Ophiuchi A and B may be separated on average by a semi-major axis of 23.2 AUs in a highly elliptical orbit (e= 0.499) that takes 83.38 years to complete. The distance separating the two stars varies from 11.4 and 34.8 AUs; they are always separated from each other by at least the orbital distance of Saturn in the Solar System. (This orbit is very similar to that of Alpha Centauri A and B.)

70 Ophiuchi A is a K0 to K1-type orange-yellow star, similar to Alpha Centauri B. 70 Ophiuchi B is slightly smaller and cooler, an orange K4-5, slightly cooler than Epsilon Indi. Neither star has large (super-Jupiter) companions at any detectable distance. Smaller planets would be below current detection thresholds so far.

It is 7.8 ly from the bright white star Altair (Alpha Aquilae)

Fiction

The system has at least one terraformed planet.