HD 66428

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HD 66428
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Monoceros
Right ascension 08h 03m 28.666s[1]
Declination −01° 09′ 45.75″[1]
Apparent magnitude (V) 8.25[2]
Characteristics
Spectral type G5[3]
Astrometry
Proper motion (μ) RA: −67.78 ± 1.05[1] mas/yr
Dec.: −207.18 ± 0.84[1] mas/yr
Parallax (π) 18.21 ± 1.07[1] mas
Distance 180 ± 10 ly
(55 ± 3 pc)
Details
Mass 1.09 ± 0.02[4] M
Radius 1.13 ± 0.03[4] R
Luminosity 1.28 ± 0.01[4] L
Surface gravity (log g) 4.37 ± 0.03[4] cgs
Temperature 5773 ± 55[4] K
Age 4.1 ± 1.4[4] Gyr
Other designations
BD−00°1891, HIP 39417, LTT 3038, SAO 135426
Database references
SIMBAD data

HD 66428 is a G-type main sequence star located approximately 179 light-years away in the constellation of Monoceros. This star is similar to our Sun with an apparent magnitude of 8.25, an effective temperature of 5705 ± 27 K and a solar luminosity 1.28. Its absolute magnitude is 11.1 while its U-V color index is 0.71. It is considered an inactive star and it is metal-rich ([Fe/H] = 0.310).[2][3][5] This star has a precise mass of 1.14552 solar masses. This precision comes from the Corot mission that measured asteroseismology.

Planetary system[edit]

In July 2006, a planet HD 66428 b was found by Paul Butler using the radial velocity method. The >2.82 MJ planet orbits at 3.18 AU away from the star.[2]

The HD 66428 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >2.82 ± 0.27 MJ 3.18 ± 0.19 1973 ± 31 0.465 ± 0.030

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. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493Freely accessible. doi:10.1086/504701. 
  3. ^ a b Kashyap, V.L.; et al. (2008). "Extrasolar Giant Planets and X-Ray Activity". Astrophysical Journal. 687 (2): 1339–1356. Bibcode:2008ApJ...687.1339K. arXiv:0807.1308Freely accessible. doi:10.1086/591922. 
  4. ^ 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. 
  5. ^ Sousa, S.G.; et al. (2008). "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program". Astronomy and Astrophysics. 487: 373–381. Bibcode:2008A&A...487..373S. arXiv:0805.4826Freely accessible. doi:10.1051/0004-6361:200809698. 

External links[edit]

Coordinates: Sky map 08h 03m 28.6652s, −01° 09′ 45.752″