Sigma Boötis

Starbox begin
name=σ Boötis Starbox image


caption =σ Boötis Starbox observe
epoch=J2000
ra=14^h 34^m 40.8171^s
dec= +29° 44′ 42.468″
appmag_v=4.46
constell=Boötes Starbox character
class=F2V
r-i = 0.19
v-r =
b-v = 0.36
u-b = -0.08
variable=Variable star Starbox astrometry
radial_v=0.2
prop_mo_ra=188.32
prop_mo_dec=132.72
parallax=64.66
p_error=0.72
absmag_v=4.82 Starbox detail
mass=1,7
radius=1,4
luminosity=6 | temperature=6,000–7,500
metal=
gravity=
rotation=3 Km/s
0,020617597911 Year
age= Starbox visbin
name=CCDM 14347+2945 B
period=
axis=237.1
eccentricity=
inclination=82
node=
periastron=

Starbox visbin
name=CCDM 14347+2945 C
period=
axis=237.0
eccentricity=
inclination=97
node=
periastron=

Starbox catalog
names=28 Boötis, HR 5447, HD 128167, Gl 557, BD+30°2536, FK5 1380, HIP 71284, SAO 83416, GC 19659, CCDM 14347+2945. Starbox reference
Simbad=HD+128167
ARICNS = Starbox reference
Simbad=IDS+14304%2B3011

Sigma Boötis (σ Boo / σ Boötis) is a star in the constellation Boötes.

Sigma Boötis is a yellow-white F-type main sequence dwarf with an apparent magnitude of +4.47. It is approximately 50.4 light years from Earth.

Located to the southeast of Rho Boötis, the fusing dwarf Sigma may at first appear as a naked-eye double, but the angular proximity with Rho is merely line-of-sight. Like many of its spectral class, Sigma is apparently a variable of the Delta Scuti variety, which vary subtly with multiple periods of hours.

Reference

* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205447 HR 5447]
* [http://www.alcyone.de/cgi-bin/search.pl?object=HR5447 HR 5447]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14347%2b2945A CCDM J14347+2945]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=14+34+40.8171%2B29+44+42.468&ident=NSV++6717&submit=Aladin+previewer Image Sigma Boötis]

Components