HD 63765

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 63765
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 07h 47m 49.719s[1]
Declination −54° 15′ 50.93″[1]
Apparent magnitude (V) 8.10
Characteristics
Spectral type G9V
Apparent magnitude (B) 8.85
Apparent magnitude (J) 6.768
Apparent magnitude (H) 6.442
Apparent magnitude (K) 6.316
B−V color index 0.75
Astrometry
Radial velocity (Rv) 22.1 km/s
Proper motion (μ) RA: 147.67 ± 0.66[1] mas/yr
Dec.: −279.19 ± 0.71[1] mas/yr
Parallax (π) 30.07 ± 0.56[1] mas
Distance 108 ± 2 ly
(33.3 ± 0.6 pc)
Absolute magnitude (MV) 5.537
Details
Mass 0.89 M
Radius 0.84 ± 0.06 R
Luminosity 0.544 ± 0.031 L
Surface gravity (log g) 4.46 cgs
Temperature 5430 ± 100 K
Metallicity −0.16
Rotation 26.7±6.7 d[2]
Other designations
CD−53°2007, HIP 38041, LTT 2952, NLTT 18486, PPM 336398, SAO 235521
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

HD 63765 is an 8th-magnitude G-type main sequence star located approximately 106 light years away in the constellation Carina. This star is smaller, cooler, dimmer, and less massive than the Sun. It has a lower iron content than our Sun, with approximately 69% of the Sun's iron-to-hydrogen ratio. In 2009, a gas giant planet was found in orbit around the star.

Planetary system[edit]

HD 63765 b is an extrasolar planet which orbits the star. This planet has at least 0.64 times the mass of Jupiter and takes 358 days to orbit the star at a semimajor axis of 0.94 AU.[3] The planet was announced in a press release dating from October 2009.

The HD 63765 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥0.64 ± 0.05 MJ 0.940 ± 0.016 358.0 ± 1.0 0.240 ± 0.043

See also[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society 452 (3): 2745−2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441. 
  3. ^ a b Ségransan, D.; et al. (2011). "The HARPS search for southern extra-solar planets. XXIX. Four new planets in orbit around the moderately active dwarfs HD 63765, HD 104067, HD 125595, and HIP 70849". Astronomy and Astrophysics 535. A54. arXiv:1107.0339. Bibcode:2011A&A...535A..54S. doi:10.1051/0004-6361/200913580. 

Coordinates: Sky map 07h 47m 49.7185s, −54° 15′ 50.921″