HD 34445

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HD 34445
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Orion
Right ascension 05h 17m 40.98s[1]
Declination +07° 21′ 12.1″[1]
Apparent magnitude (V) 7.32
Characteristics
Spectral type G0
Apparent magnitude (B) 7.94
B−V color index 0.62
Variable type none
Astrometry
Radial velocity (Rv) –79.4 km/s
Proper motion (μ) RA: -0.46 ± 0.74[1] mas/yr
Dec.: -147.17 ± 0.43[1] mas/yr
Parallax (π) 21.52 ± 0.66[1] mas
Distance 152 ± 5 ly
(46 ± 1 pc)
Absolute magnitude (MV) 4.05
Details
Mass 1.07 M
Radius 1.38 R
Luminosity 2.01 L
Surface gravity (log g) 4.21 cgs
Temperature 5836 K
Metallicity +0.14
Rotation ~22 days
Rotational velocity (v sin i) 2.7 ± 0.5 km/s
Age 8.5 ± 2.0 Gyr
Other designations
BD+07°855, HIP 24681, PPM 148717, SAO 112601
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

HD 34445 is a 7th magnitude G-type star located approximately 152 light years away in the constellation Orion. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is 40% greater than the Sun. In 2004, a gas giant planet was found in orbit around the star. But it wasn’t until 2009 that this planet was confirmed.

The HD 34445 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥0.79 ± 0.07 MJ 2.07 ± 0.02 1049 ± 11 0.27 ± 0.07

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. ^ Howard, Andrew W. et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal 721 (2): 1467–1481. arXiv:1003.3488. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467. 

Coordinates: Sky map 05h 17m 40.9786s, +07° 21′ 12.036″