Alpha Lacertae

Alpha Lacertae

Starbox begin
name = α Lacertae
Starbox observe
epoch = J2000.0
equinox = J2000.0 (ICRS)
constell = Lacerta
ra = RA|22|31|17.5010SIMBAD link|alf+lac|* alf Lac -- Star in double system, database entry, SIMBAD. Accessed on line September 3, 2008.]
dec = DEC|+50|16|56.969
appmag_v=3.777
Starbox character
class = A1V
u-b = 0.00 [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=8585 HR 8585] , database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50] . Accessed on line September 3, 2008.]
b-v = +0.01
r-i = −0.03
Starbox astrometry
radial_v = −4.0 ± 2
prop_mo_ra = 137.22
prop_mo_dec = 17.15
parallax = 31.86
p_error = 0.54
parallax_footnote =
absmag_v= 1.29 [From apparent magnitude and parallax.]
Starbox detail
mass = ~2
temperature = 9200 [http://www.astro.uiuc.edu/~kaler/sow/alphalac.html Alpha Lac] , Jim Kaler, "Stars". Accessed on line September 3, 2008.]
luminosity_bolometric = 27
rotational_velocity = 146
radius = 1.9 [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=II/224/cadars.dat&recno=10391 HD 213558] , database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?II/224 II/224] . Accessed on line September 3, 2008.]
Starbox catalog
names=α Lac, Alpha Lacertae, Alpha Lac, 7 Lacertae, 7 Lac, BU 703A, ADS 16021 A, BD+49°3875, CCDM J22313+5017A, FK5 848, GC 31471, HD 213558, HIP 111169, HR 8585, IDS 22272+4946 A, PPM 40777, SAO 34542, WDS 22131+5017A.
Starbox reference
Simbad=alf+lac

Alpha Lacertae (Alpha Lac / α Lacertae / α Lac) is an A-type main sequence star in the constellation of Lacerta. It is the brightest star in Lacerta and has an apparent visual magnitude of approximately 3.777.

Visual companion

Starbox begin
name = CCDM J22313+5017B
Starbox observe
epoch = J2000.0
equinox = J2000.0 (ICRS)
constell = Lacerta
ra = RA|22|31|13.2SIMBAD link|BD%2B49+3875B|BD+49 3875B -- Star in double system, database entry, SIMBAD. Accessed on line September 3, 2008.]
dec = DEC|+50|17|09
appmag_v=11.8
Starbox character
class = A5
b-v = 0.0
Starbox relpos
primary=α Lacertae
epoch=1925
posang=294
posangref=
angdistsec=36.3
angdistref=
Starbox catalog
names=BU 703B, ADS 16021 B, BD+49°3875B, IDS 22272+4946 B, WDS 22131+5017B.
Starbox reference
Simbad=BD%2B49+3875B

The star has a visual companion, CCDM J22313+5017B, of spectral type A and apparent visual magnitude 11.8, approximately 36 arcseconds away.Entry 22313+5017, discoverer code BU 703, [http://ad.usno.navy.mil/wds/wdsnewframe4.html The Washington Double Star Catalog] ,
United States Naval Observatory. Accessed on line September 3, 2008.] The companion is optical, a chance line-of-sight coincidence.

References


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