Sigma Boötis: Difference between revisions

σ Boötis
	File:Sigma Bootis.jpg; σ Boötis
Observation data; Epoch J2000 Equinox J2000
Constellation	Boötes
Right ascension	14h 34m 40.8171s
Declination	+29° 44′ 42.468″
Apparent magnitude (V)	4.46
Characteristics
Spectral type	F2V
U−B color index	-0.08
B−V color index	0.36
R−I color index	0.19
Variable type	Variable star
Astrometry
Radial velocity (Rv)	0.2 km/s
Proper motion (μ)	RA: 188.32 mas/yr ; Dec.: 132.72 mas/yr
Parallax (π)	64.66 ± 0.72 mas
Distance	50.4 ± 0.6 ly ; (15.5 ± 0.2 pc)
Absolute magnitude (MV)	4.82
Details
Mass	1,7 M☉
Radius	1,4 R☉
Luminosity	6 L☉
Temperature	6,000–7,500 K
Rotation	3 Km/s ; 0,020617597911 Year
Orbit
Companion	CCDM 14347+2945 B
Semi-major axis (a)	237.1″
Inclination (i)	82°
Orbit
Companion	CCDM 14347+2945 C
Semi-major axis (a)	237.0″
Inclination (i)	97°
Other designations
	28 Boötis, HR 5447, HD 128167, Gl 557, BD+30°2536, FK5 1380, HIP 71284, SAO 83416, GC 19659, CCDM 14347+2945.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue,; CCDM (2002),; Bright Star Catalogue (5th rev. ed.)
Database references
SIMBAD	data

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Revision as of 18:56, 11 September 2008

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

Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
IDS 14304+3011 B (BD+30 2536B)	14^h 34^m 57.4522^s	+29° 45' 02.971	10.9	F9III	Simbad
IDS 14304+3011 C (BD+30 2536C)	14^h 34^m 58.1^s	+29° 44' 06	11.3		Simbad

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@@ Line 1: / Line 1: @@
-{{Starbox short |
+{{Starbox begin |
-| name=σ Boötis
+   name=σ Boötis }}
+{{Starbox image
-| epoch=[[J2000.0]]
+| image = [[Image:Sigma Bootis.jpg|275px|]]
-| constell=[[Boötes]]
+| caption =σ Boötis
-| ra=14<sup>h</sup> 34<sup>m</sup> 40.8<sup>s</sup>
+}}
-| dec=+29° 44' 42"
+{{Starbox observe |
-| spectral=F2V
+  epoch=J2000 |
-| appmag_v=+4.47
+  ra=14<sup>h</sup> 34<sup>m</sup> 40.8171<sup>s</sup> |
-| dist_ly=50.4 ± 0.6
+  dec= +29° 44&prime; 42.468&Prime; |
-| dist_pc=15.5 ± 0.2
+  appmag_v=4.46 |
-| names=28&nbsp;Boötis, [[Harvard Revised catalogue|HR]]&nbsp;5447, [[Henry Draper Catalogue|HD]]&nbsp;128167, [[Gliese-Jahreiss catalogue|Gl]]&nbsp;557, [[Bonner Durchmusterung|BD]]+30°2536, [[Fifth Fundamental Catalogue|FK5]]&nbsp;1380, [[Hipparcos catalogue|HIP]]&nbsp;71284, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;83416, GC&nbsp;19659, CCDM&nbsp;14347+2945
+  constell=[[Boötes (constellation)|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 <br>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&nbsp;Boötis, [[Harvard Revised catalogue|HR]]&nbsp;5447, [[Henry Draper Catalogue|HD]]&nbsp;128167, [[Gliese-Jahreiss catalogue|Gl]]&nbsp;557, [[Bonner Durchmusterung|BD]]+30°2536, [[Fifth Fundamental Catalogue|FK5]]&nbsp;1380, [[Hipparcos catalogue|HIP]]&nbsp;71284, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;83416, GC&nbsp;19659, CCDM&nbsp;14347+2945. }}
+{{Starbox reference |
+  Simbad=HD+128167
+| ARICNS = }}
+{{starbox sources|HIP|CCDM|HR}}
+{{Starbox reference |
+  Simbad=IDS+14304%2B3011 }}
+{{Starbox end}}
 '''Sigma Boötis''' (σ Boo / σ Boötis) is a [[star]] in the [[constellation]] [[Boötes]].
 Sigma Boötis is a yellow-white [[stellar classification|F-type]] [[main sequence|main sequence dwarf]] with an [[apparent magnitude]] of +4.47.  It is approximately 50.4 [[light years]] from [[Earth]].
+[[Image:Boötes constellation map.png|thumb|left|250px|Boötes Constellation]]
 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 variable|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===
+{| border="0" width="100%" cellpadding="2" cellspacing="1" style="float:right; margin-rigth:0.5em; background:#CDC9C9;"
+! colspan="1" | NAME || [[Right ascension]] || [[Declination]] || [[Apparent magnitude]] (V) || [[Spectral type]] || Database references
+|- bgcolor="#FFFAFA"
+| IDS 14304+3011 B (BD+30 2536B) || 14<sup>h</sup> 34<sup>m</sup> 57.4522<sup>s</sup> || +29° 45' 02.971'' || 10.9 || F9III || [http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=BD%2b30%20%202536B&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id Simbad]
+|- bgcolor="#FFFAFA"
+| IDS 14304+3011 C (BD+30 2536C) || 14<sup>h</sup> 34<sup>m</sup> 58.1<sup>s</sup> || +29° 44' 06'' || 11.3 ||  || [http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=BD%2b30%20%202536C&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id Simbad]
+|}
+{{star-stub}}
+{{Binary-star-stub}}
+[[Category:HD_and_HDE_objects|128167]]
+[[Category:Binary stars]]
+[[Category:HIP objects|071284]]
+{{var-star-stub}}
 [[Category:Bayer objects|Boötis, Sigma]]