Xi Boötis

Starbox begin
name=Xi Boötis A/B Starbox observe
epoch=J2000
ra=14^h 51^m 23.4^s
dec=+19° 06′ 02″
appmag_v=4.70/6.97
constell=Boötes Starbox character
class=G8 Ve/K4 Ve
r-i = 0.43 / 0.28
v-r =
b-v=0.73/1.15
u-b=0.24/1.15
variable=BY Draconis/None
Flare Star Starbox astrometry
radial_v=+1.0
prop_mo_ra=152.81
prop_mo_dec=-71.28
parallax=147.57
p_error=0.72
distance=21.8±0.1
absmag_v=5.54/7.81 Starbox visbin
name=Xi Boötis B
CCDM 14513+1906 B
period=151.6
axis=4.94
eccentricity=0.51
inclination=140.04
node=348.1
periastron=1909.361 Starbox visbin
name=CCDM 14513+1906 C
period=
axis=66.7
eccentricity=
inclination=348
node=
periastron= Starbox visbin
name=CCDM 14513+1906 D
period=
axis=148.9
eccentricity=
inclination=286
node=
periastron= Starbox detail
mass=0.9/0.7
radius=0.89/0.71
luminosity=0.49/0.061
temperature=5128K/3410
metal=55-155/? %
rotation=3 Km/s /
age=< 10⁹ Starbox catalog
names=37 Boötis, Gl 566, HR 5544, BD +19°2870, HD 131156, GCTP 3360.00, SAO 101250, Struve 1888, ADS 9413, GC 19991, CCDM 14513+1906 and HIP 72659 Starbox reference
Simbad=HD+131156
ARICNS=01171 Starbox reference
Simbad=CCDM+J14513%2B1906

Xi Boötis (ξ Boo / ξ Boötis) is a double star system 21.8 light years away from Earth. It is the nearest visible star in the constellation Boötes.

The primary star in this system, ξ Boötis A, is a BY Draconis variable with an apparent magnitude that varies from +4.52 to +4.67 with a period just over 10 days long, and is classified as a yellow G-type main sequence dwarf. Small velocity changes in the orbit of the companion star, ξ Boötis B, an orange K-type main sequence dwarf, indicate the presence of a small companion that is less than nine times the mass of Jupiter.Fact|date=February 2007 The AB binary can be resolved and displays a gorgeous sight even through smaller telescopes.

The primary star (A) has been identified as a candidate for possessing a kuiper-like belt, [cite web | last = Hinshaw | first = Gary | date = February 3 1997 | url = http://ssc.spitzer.caltech.edu/documents/SRD.pdf | title = Science Requirements Document | publisher = NASA JPL | format = PDF | accessdate = 2006-08-10] based on infrared observations. The estimated minimum mass of this dust disk is 2.4 times the mass of the Earth's Moon. (Compare to the value of 8.2 lunar masses for the Kuiper belt.) [cite journal
author=E. K. Holmes, H. M. Butner, S. B. Fajardo-Acosta, and L. M. Rebull | title=A Survey of Nearby Main-Sequence Stars for Submillimeter Emission | journal=The Astronomical Journal | year=2003 | volume=125 | issue=6 | pages=3334–3343 | url=http://www.iop.org/EJ/article/1538-3881/125/6/3334/200031.html | doi=10.1086/375202 ]

References

* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205544 HR 5544]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?GJ%20566%20B GJ 566 B]
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14513%2b1906A CCDM J14513+1906]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=SV*+SVS++2491&ident=SV*+SVS++2491&submit=Aladin+previewer Image Xi Boötis]

External links

* cite web
title=Xi Boötis | work=SolStation
url=http://www.solstation.com/stars/xibootis.htm
accessmonthday=November 3
accessyear=2005
* cite web
title=Xi Boötis | work=Alcyone
url=http://www.alcyone.de/SIT/mainstars/SIT000280.htm
accessmonthday=March 14
accessyear=2006

Components

Flare stars