Zeta Andromedae

Starbox begin
name = ζ AndromedaeStarbox observe
epoch = J2000.0
equinox = J2000.0 (ICRS) | constell = Andromeda | ra = RA|00|47|20.3254SIMBAD link|zet+and|V* zet And -- Eclipsing binary of beta Lyr type, database entry, SIMBAD. Accessed on line August 29, 2008.]
dec = DEC|+24|16|01.841
appmag_v=3.92 to 4.14zet And, database entry, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars] , Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 29, 2008.] Starbox character
class = K1IIe
u-b = +0.90 [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=215 HR 215] , 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 August 29, 2008.]
b-v = +1.12
r-i = +0.59
variable = ELL/RSStarbox astrometry
radial_v = −23.7 ± 0.9
prop_mo_ra = −101.23
prop_mo_dec = −81.89
parallax = 17.98
p_error = 0.83
parallax_footnote =
absmag_v= 0.3 [From apparent magnitude and parallax.] Starbox detail
rotational_velocity = 40
radius = 8.30 [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=II/224/cadars.dat&recno=281 HD 4502] , 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 August 29, 2008.] Starbox catalog
names=ζ And, Zeta Andromedae, Zeta And, 34 Andromedae, 34 And, BD+23°106, CCDM J00473+2416A, FK5 27, GC 940, HD 4502, HIP 3693, HR 215, IDS 00421+2344 A, PPM 90149, SAO 74267, WDS 00473+2416A.Starbox reference
Simbad=zet+and

Zeta Andromedae (Zeta And / ζ Andromedae / ζ And) is a star system in the constellation Andromeda. It is approximately 181 light years from Earth.

Zeta Andromedae is an eclipsing spectroscopic binary whose primary is classified as an orange K-type bright giant with a mean apparent magnitude of +4.08. In addition to brightness variation due to eclipses, the system is also an RS Canum Venaticorum type or Beta Lyrae type variable star. Its brightness varies from magnitude +3.92 to +4.14 with a period of 17.77 days. The orbital period of the binary is 17.77 days.

Location

This star's location in the constellation Andromeda can be seen in the following diagram:

Components

A number of visual companions to the eclipsing binary have been observed. B has common proper motion with A, but C and D are probably optical.

Componentbox begin
designation=WDS 00473+2416
footnote=Entry 00473+2416, [http://ad.usno.navy.mil/wds/wdsnewframe1.html The Washington Double Star Catalog] ,
United States Naval Observatory. Accessed on line August 29, 2008.]
expanded = yesComponentbox component
letter = B
primary = A
appmag_v = 15.3
epoch = 1959
posang= 0
angdist= 32.6
ra = RA|00|47|20.2
dec = DEC|+24|16|33
radec_footnote = [SIMBAD link|IDS+00421%2B2344+B|BD+23 106B -- Star in double system, database entry, SIMBAD. Accessed on line August 29, 2008.]
simbad = IDS+00421%2B2344+B
expanded = yesComponentbox component
letter = C
primary = A
appmag_v = 13.6
epoch = 1997
posang= 231
angdist= 97.0
ra = RA|00|47|15.2
dec = DEC|+24|15|03
radec_footnote = [SIMBAD link|IDS+00421%2B2344+C|BD+23 106C -- Star in double system, database entry, SIMBAD. Accessed on line August 29, 2008.]
simbad = IDS+00421%2B2344+C
expanded = yesComponentbox component
letter = D
primary = A
appmag_v = 10.80
epoch = 2006
posang= 260
angdist= 155.5
ra = RA|00|47|08.9990
dec = DEC|+24|15|33.584
radec_footnote = [SIMBAD link|IDS+00421%2B2344+D|BD+23 106D -- Star in double system, database entry, SIMBAD. Accessed on line August 29, 2008.]
simbad = IDS+00421%2B2344+D
expanded = yes

References

External links

* [http://www.alcyone-software.com/cgi-bin/search.pl?object=HR0215 Zeta Andromedae] at Alcyone Software's Star Data Pages
* [http://aladin.u-strasbg.fr/AladinPreview?-c=V*+zet+And&ident=V*+zet+And&submit=Aladin+previewer Image ζ Andromedae]