HD 75289

Starbox begin
name = HD 75289Starbox observe
epoch = J2000.0
constell = Vela
ra = RA|08|47|40.3894
dec = DEC|–41|44|12.452
appmag_v = 6.36 Starbox character
class = G0V
r-i =
v-r =
b-v = 0.58
u-b =
variable = Starbox astrometry
radial_v = +14
prop_mo_ra = –20.50
prop_mo_dec = –227.68
parallax = 34.55
p_error = 0.56
absmag_v = 4.05 Starbox detail
age = 4.96
metal = 0.29
mass = 1.05
radius = 1.25
gravity = 4.25
rotation = ~24.6
luminosity = 1.82
temperature = 6011 Starbox catalog
names = CD-41° 4507, HIP 43177, HR 3497, GC 12153 , SAO 220481

HD 75289 is a 6th magnitude star in the constellation of Vela. Like our Sun, it is a yellow dwarf but slightly more massive, hotter and luminous. The spectral type of the star is G0 V. Under exceptionally good circumstances it might be visible to the unaided eye; however, usually binoculars are needed.

In 2004, a possible red dwarf companion was detected.

Planetary system

In 1999 a planet HD 75289 b with half the mass of Jupiter was detected by radial velocity method. This planet is a typical hot Jupiter that takes only about 3.51 days to revolve at an orbital distance of 0.0482 AU.

PlanetboxOrbit
exoplanet = b
mass = >0.467 ± 0.041
period = 3.509267 ± 0.000064
semimajor = 0.0482 ± 0.00028
eccentricity = 0.034 ± 0.029

HD 75289 B

Starbox short
name=HD 75289 B
epoch=2000
constell=Vela
ra=8^h 47^m 42.24^s
dec=-41° 44' 7.70"
spectral=M2-M5 V
appmag_v=?
dist_ly=94.36?
dist_pc=28.94?
names="n/a"

HD 75289 B is a possible red dwarf star orbiting HD 75289. The stars share the same proper motion so they are likely related. Apparent distance between the two stars is about 21.5 arcseconds, at a distance of 94 light years that would be 621 astronomical units. However, the radial distance between the stars is unknown, so they are likely further apart. In any case, one revolution around the primary would take thousands of years to complete.

The study that found the red dwarf also rules out any further stellar companions beyond 140 AUs and massive brown dwarf companions from 400 AU up to 2000 AU.

External links

* [http://simbad.u-strasbg.fr/Simbad SIMBAD] [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=HD+75289 star entry] , [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=NAME+HD+75289+B planet entry] , [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=HD+75289B component B entry]
* [http://www.edpsciences.org/articles/aa/abs/2004/37/aa1009/aa1009.html M. Mugrauer, R. Neuhäuser, T. Mazeh, J. Alves and E. Guenther: M. A low-mass stellar companion of the planet host star HD 75289]