HD 23127

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 23127
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Reticulum
Right ascension 03h 39m 23.64s[1]
Declination –60° 04′ 40.2″[1]
Apparent magnitude (V) +8.58
Characteristics
Spectral type G2V
B−V color index 0.65
Variable type “None”
Astrometry
Radial velocity (Rv) ? km/s
Proper motion (μ) RA: 75.27 ± 0.67[1] mas/yr
Dec.: 143.03 ± 0.68[1] mas/yr
Parallax (π) 10.13 ± 0.67[1] mas
Distance 320 ± 20 ly
(99 ± 7 pc)
Absolute magnitude (MV) 3.83
Details
Mass 1.26 ± 0.04[2] M
Radius 1.71 ± 0.03[2] R
Luminosity 3.01 ± 0.03[2] L
Surface gravity (log g) 4.06 ± 0.02[2] cgs
Temperature 5843 ± 52[2] K
Metallicity +0.34
Rotation ~46.1 days
Age 4.8 ± 0.6[2] Gyr
Other designations
CD-60°762, GSC 08867-00913, HIP 17054, SAO 248860
Database references
SIMBAD data

HD 23127 is a star in the Reticulum constellation. At the distance of 320 ly,[1] it is not visible to the naked eye, but it is visible with a good pair of binoculars.

Star[edit]

HD 23127 is a hydrogen-fusing sun-like star with spectrum G2V. The star is more massive than our Sun at 1.13 solar mass. The star is also more metal-rich, meaning it contains two times more metals [Fe/H] than our Sun. It is older than the local star at 7 billion years, more than halfway through its life.

Planetary system[edit]

On Friday, February 9, 2007, a 1214-day period jovian planet was found by using the wobble method by O’Toole in Australia. It has minimum mass 37% greater than Jupiter and orbits in 44% eccentricity. The distance from the star ranges from 1.28 to 3.30 astronomical units with the average distance 2.29 AU.[3]

The HD 23127 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >1.5 ± 0.2 MJ 2.4 ± 0.3 1214 ± 9 0.44 ± 0.07

See also[edit]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c d e f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. Bibcode:2015A&A...575A..18B. arXiv:1411.4302Freely accessible. doi:10.1051/0004-6361/201424951. 
  3. ^ a b O'Toole, Simon J.; et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal. 660 (2): 1636–1641. Bibcode:2007ApJ...660.1636O. arXiv:astro-ph/0702213Freely accessible. doi:10.1086/513563. 

External links[edit]

  • "HD 23127". The Extrasolar Planets Encyclopedia. 

Coordinates: Sky map 03h 39m 23.639s, −60° 04′ 40.230″