Zeta Trianguli Australis

Starbox begin
name=Zeta Trianguli Australis Starbox observe
epoch=J2000
ra=16^h 28^m 28.1^s
dec=-70° 05′ 04″
appmag_v=4.90
constell=Triangulum Australe Starbox character
class=F9 V (F6V + G1V)
b-v=0.54
u-b=0.03
variable=? Starbox astrometry
radial_v=+7.6
prop_mo_ra=199.88
prop_mo_dec=110.77
parallax=82.61
p_error=0.57
absmag_v=4.49 Starbox catalog
names=Gl 624, HR 6098, CD -69°2558, HD 147584, LTT 6558, GCTP 3719.00, SAO 253554, FK5 610, GC 22089, HIP 80686.

Zeta Trianguli Australis (ζ TrA) is a spectroscopic binary in the constellation Triangulum Australe. It is approximately 39.5 light years from Earth.

The system is composed of two main sequence stars, one a yellow-white F-type dwarf and the other a yellow G-type dwarf. The binary's composite spectral class is F9V and its combined apparent magnitude is +4.90. The pair orbit each other once every 13 days, and the orbital eccentricity is 0.014.

Somewhat surprisingly for a star located at 70° S, it is a swarm member of the Ursa Major moving group.

References

* Jovan Skuljan, 2004, "Accurate orbital parameters for the bright southern spectroscopic binary ζ Trianguli Australis – an interesting case of a near-circular orbit", "Monthly Notices of the Royal Astronomical Society", Volume 352, p. 975.