HD 73526

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HD 73526
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 08h 37m 16.484s[1]
Declination −41° 19′ 08.76″[1]
Apparent magnitude (V) +9.00
Characteristics
Spectral type G6V
U−B color index ?
B−V color index 0.69
V−R color index ?
R−I color index ?
Variable type “None”
Astrometry
Radial velocity (Rv) +26.1 km/s
Proper motion (μ) RA: -59.95 ± 0.86[1] mas/yr
Dec.: 162.23 ± 0.92[1] mas/yr
Parallax (π) 9.93 ± 1.01[1] mas
Distance approx. 330 ly
(approx. 100 pc)
Absolute magnitude (MV) +4.02
Details
Mass 1.02 M
Radius 1.49 R
Luminosity 1.77 L
Surface gravity (log g) 4.08 cgs
Temperature 5470 K
Metallicity +0.28
Rotation ? days
Age 5.59 Gyr
Other designations
HIP 42282, SAO 220191
Database references
SIMBAD data

HD 73526 is a yellow dwarf star (G6V) about 323 light-years away in the constellation Vela.

Star[edit]

The star is cooler, more luminous, similar mass, and larger than our Sun. This star is 22% older than our Sun and with metallicity nearly doubled with the Sun, based on its abundance of iron.

Planetary system[edit]

In 2002, a 2.1 MJ planet HD 73526 b was discovered orbiting its star in an orbit just a little smaller than that of Venus' orbit around the Sun.[2] This planet receives insolation 3.65 times that of Earth or 1.89 times that of Venus. This single planetary system was known for four years until 2006 when 2.3 MJ second planet HD 73526 c was found. This planet forms 2:1 orbital resonance with the planet b.[3] Although those masses are minimal as inclinations of these planets are not known, orbital stability analysis indicated that orbital inclinations of both planets are likely to be near 90°, making minimum masses very close to the true masses of the planets. [4]

The HD 73526 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >2.07 ± 0.16 MJ 0.66 ± 0.05 187.5 ± 0.3 0.39 ± 0.05
c >2.30 ± 0.17 MJ 1.05 ± 0.08 376.9 ± 0.9 0.40 ± 0.05

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. ^ Tinney, C. G. et al. (2003). "Four New Planets Orbiting Metal-enriched Stars". The Astrophysical Journal 587 (1): 423–428. arXiv:astro-ph/0207128. Bibcode:2003ApJ...587..423T. doi:10.1086/368068. 
  3. ^ a b Tinney, C. G. et al. (2006). "The 2 : 1 Resonant Exoplanetary System Orbiting HD 73526". The Astrophysical Journal 647 (1): 594–599. arXiv:astro-ph/0602557. Bibcode:2006ApJ...647..594T. doi:10.1086/503706. 
  4. ^ A Detailed Analysis of the HD 73526 2:1 Resonant Planetary System: Robert A. Wittenmyer, Xianyu Tan, Man Hoi Lee, Jonathan Horner, C.G. Tinney, R.P. Butler, G.S. Salter, B.D. Carter, H.R.A. Jones, S.J. O'Toole, J. Bailey, D. Wright, J.D. Crane, S.A. Schectman, P. Arriagada, I. Thompson, D. Minniti, M. Diaz

External links[edit]

Coordinates: Sky map 08h 37m 16.4839s, −41° 19′ 08.767″