Phi2 Pavonis

Starbox begin
name = Phi² PavonisStarbox observe
epoch = J2000.0
constell = Pavo
ra = RA|20|40|02.64
dec = DEC|-60|32|40
appmag_v = +5.12Starbox character
class = F8V
r-i =
v-r =
b-v =
u-b =
variable = "None"Starbox astrometry
radial_v =
prop_mo_ra =
prop_mo_dec =
parallax =
p_error =
parallax_footnote =
dist_ly = 81.6
dist_pc = 25
space_v_u =
space_v_v =
space_v_w =
absmag_v = Starbox detail
source =
mass =
radius = 1.87
gravity =
luminosity =
temperature = 6200
metal = −0.44 Fe/H [cite journal | author=Edvardsson, B., Andersen, J., Gustafsson, B., "et al." | year=1993 | journal=A&A|issue=275 | page=101 |title=The chemical evolution of the galactic disk I. Analysis and results]
rotation = 7 days?
age = 5 GyrStarbox catalog
names = HD 196378, HR 7875Starbox reference
Simbad = HD+196378
ARICNS =

Phi² Pavonis (φ² Pav / φ² Pavonis), also known as HD 196378, is a yellow-white dwarf star approximately 82 light-years away in the constellation of Pavo (the Peacock). It is evolving into a subgiant.

This system was in 1991 a test case for the "Zeta Herculis moving group", of low metallicity stars with 5 billion years of age. This group includes besides Zeta Herculis: δ Trianguli, ζ Reticuli, 1 Hydrae, Gl 456, Gl 678, and Gl 9079. [cite journal | author=G. F. Porto de Mello, L. da Silva | title=On the physical existence of the Zeta HER moving group - A detailed analysis of Phi exp 2 Pavonis | journal=Astronomical Journal | year=1991 | volume=102 | pages=1816–1825 | http://adsabs.harvard.edu/abs/1991AJ....102.1816P | doi=10.1086/116006 ]

In 1998, using the European Southern Telescope in Chile, an planet was announced to be orbiting the star. [cite journal | journal=Workshop: Science With Gemini |title=The ESO radial velocity planet search program | author=M. Kürster |url=http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=42666AC365051E901C1259A0E340E723?doi=10.1.1.53.4018&rep=rep1&type=pdf |year=1998] This team retracted this claim in 2002, but found a different periodicity of 7 days possibly due to stellar rotation. [cite journal | journal=Astronomy & Astrophysics | volume=392| pages=671-690 |year=2002| doi=10.1051/0004-6361:20020937| title=The planet search program at the ESO Coudé Echelle spectrometer III. The complete Long Camera survey results | author=M. Endl, M. Kürster "et al." | url=http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/ref/2002/35/aa2400/aa2400.html]

See also

* Zeta Herculis

References

External links

* [http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=18 Phi2 Pavonis] at Extrasolar Visions (listed as "controversial" [http://www.extrasolar.net/starlisttour.asp?StarCatID=normal&ShowUncertain=1&Order= here] and not updated before 2005)