- Zeta Herculis
Starbox begin
name=Zeta Herculis A/B Starbox observe
epoch=J2000
ra=RA|16|41|17.16
dec=DEC| +31|36|09.8
appmag_v=2.89
constell=Hercules Starbox character
class=G0 IV/K0 V
b-v=0.64
u-b=0.21
variable=Suspected Starbox astrometry
radial_v=-69.9
prop_mo_ra=-462.64
prop_mo_dec=345.08
parallax=92.64
p_error=0.60
absmag_v=2.72 Starbox detail
mass=1.5/0.85
radius=2.5/0.92
luminosity=6/0.65
temperature=5780/5420
metal=? % Sun
rotation=<10 km/s.
age=3.8 × 109 Starbox catalog
names=ζ Her, 40 Her, 40 Herculis, GJ 635, HR 6212, BD +31°2884, HD 150680, LHS 3234, LTT 14952, GCTP 3799.00, SAO 65485, NSV 07915, WDS 16413+3136, HIP 81693.Zeta Herculis (ζ Her, ζ Herculis) is a
binary star system in theconstellation Hercules. The primary star is a sub-giant that is somewhat larger than theSun and has just begun to evolve away from themain sequence . It is orbited by a smaller and fainter star that is separated from the primary by just over 1arcsec . The stars orbit each other with a period of 34.5 years and a semi-major axis of 1.36". Stars A & B are separated each other by an average separation of 14.65 AUs and swing as close as 8 AUs and as far away as 21.3 AUs.This system forms part of the "Zeta Herculis moving group" of stars. This group includes: δ Trianguli, φ2 Pavonis, ζ Reticuli,
1 Hydrae , Gl 456, Gl 678, and Gl 9079. [cite journal | author=G. F. Porto de Mello, L. da Silva | title=On the physical existence of the Zeta HER moving group - A detailed analysis of Phi exp 2 Pavonis | journal=Astronomical Journal | year=1991 | volume=102 | pages=1816–1825 | http://adsabs.harvard.edu/abs/1991AJ....102.1816P | doi=10.1086/116006 ]References
External links
*
*
*
Wikimedia Foundation. 2010.
