Epsilon Boötis

Starbox begin
name=Epsilon Boötis A/B Starbox image


caption =Epsilon Boötis Starbox observe
epoch=J2000
ra=14^h 44^m 59.2^s
dec=+27° 04′ 27.2″
appmag_v=2.70 / 5.12
constell=Boötes Starbox character
class=K0 II-III/A2 V
b-v=0.97
u-b=0.73
r-i = 0.52
v-r =
variable= Starbox astrometry
radial_v=-16.6
prop_mo_ra=-44.1
prop_mo_dec=13.0
parallax=13.0
p_error=7.0
dist_ly=
dist_pc=
absmag_v=3.67 / 5.2 Starbox detail
mass=4/2
radius=33/2
luminosity=400/27 | temperature=4,800/8,700
metal=230% Sun
rotation=
age=3 × 10⁸

Starbox visbin
name=CCDM 14449+2704 B
period=
axis=3.0
eccentricity=
inclination=339
node=
periastron=

Starbox visbin
name=CCDM 14449+2704 C
period=
axis=177.0
eccentricity=
inclination=256
node=
periastron= Starbox catalog
names=Izar, Pulcherrima, Mirac, Mirak, Mirach, 36 Boo, HR 5506/5505, BD +27°2417, HD 129989/129988, SAO 83500, HIP 72105. Starbox reference
Simbad=HD+129989
ARICNS = Starbox reference
Simbad=ADS+9372

Epsilon Boötis (ε Boo / ε Boötis) is a star in the constellation Boötes. It also has the traditional names Izar or Pulcherrima.

Izar is actually a binary star, consisting of a bright orange giant and a smaller main sequence star. The orange giant is a fairly late-stage star well into its stellar evolution, having already exhausted its supply of hydrogen fuel. By the time the smaller main sequence star reaches this point in its evolution, the primary star will have lost much of its mass in a planetary nebula and will have evolved into a white dwarf, and the pair will have essentially changed roles: the primary star becoming the dim dwarf, while the lesser A star will shine as a bright orange giant.

The name Izar is derived from the Arabic ازار "izār" "veil," and the name Pulcherrima is derived from the Latin for "loveliest."

In fiction

: See "Epsilon Boötis in fiction".: See "Garth of Izar"

Position

Reference

* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205506 HR 5506]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205505 HR 5505]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14449%2b2704A CCDM J14449+2704]
* [http://www.alcyone.de/cgi-bin/search.pl?object=HR5505 HR 5505]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=14+44+59.208%2B27+04+27.38&ident=HD+129989&submit=Aladin+previewer Image Epsilon Boötis]
* [http://www.purplehell.com/riddletools/stars.htm The Constellations and Named Stars]

Components