HR 465

Starbox begin
name=HR 465 Starbox image


caption = GY Andromedae Starbox observe
epoch=J2000
ra=01^h 38^m 31.8^s
dec=+45° 23′ 59″
appmag_v=6.36
constell=Andromeda Starbox character
class=B9 pCrEu
b-v=0.04
u-b=-0.1
variable=α² Canum Venaticorum Starbox astrometry
radial_v=3
prop_mo_ra=-16.21
prop_mo_dec=0.59
parallax=7.17
p_error=0.85
dist_ly=455
dist_pc=140
absmag_v=0.64 Starbox detail
mass=18
radius=7
luminosity=20,000 | temperature=10,000–30,000
metal=?
rotation=0.051135863788 Year
age=? Starbox visbin
name=GY Andromedae B
period=0.7474
axis=
eccentricity=
inclination=37.4
node=
periastron= Starbox catalog
names=GY Andromedae, HR 465, BD +44°341, HD 9996, SAO 37393, HIP 7651. Starbox reference
Simbad=HD+9996

HR 465 (GY Andromedae or GY And) is an Alpha2 Canum Venaticorum type variable star in the constellation Andromeda. Its brightness fluctuates between 6.27 mag and 6.41 mag. It belongs to the group of CP stars (chemically peculiar stars). Its most striking characteristic is the occurrence of the element promethium in its emission spectrum. It is also a spectroscopic binary star with a period of almost 273 days and an eccentricity of 0.47.

References

* Aller, M. F. 1971. "Promethium in the star HR465", "Sky & Telescope", vol.41, pp.220-222
* Scholz, G., 1978, "Spectroscopic investigations of the magnetic AP star HD 9996", "Astronomische Nachrichten", vol. 299, no. 2. pp. 81-85.

External links

* [http://www.astronomical.org/portal/modules/wfsection/article.php?articleid=1 www.astronomical.org]
* [http://jumk.de/astronomie/special-stars/gy-andromedae.shtml jumk.de/]
* [http://jumk.de/astronomie/img/gy-andromedae.jpgImage GY Andromedae]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=01+38+31.8241%2B45+23+58.943&ident=V*+GY+And&submit=Aladin+previewer Image GY Andromedae]
* [http://www.alcyone.de/cgi-bin/search.pl?object=HR465 www.alcyone.de/]