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HD 88133 is an 8th magnitude star in the constellation of Leo. It is classified as a yellow main sequence star (spectral type G8V). It is slightly more massive than the Sun, cooler and more luminous. Located at a distance of 241 light years from Earth it is not in our immediate neighbourhood and thus not visible to the unaided eye. With a small telescope it should be easily visible.

HD 88133
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo
Right ascension 10h 10m 07.6764s[1]
Declination +18° 11′ 12.7322″[1]
Apparent magnitude (V) 8.01[2]
Characteristics
Spectral type G8V[3]
B−V color index 0.810±0.015[2]
Astrometry
Radial velocity (Rv)−3.62±0.14[1] km/s
Proper motion (μ) RA: −11.076±0.119[1] mas/yr
Dec.: −265.160±0.085[1] mas/yr
Parallax (π)13.5561 ± 0.0557 mas[1]
Distance240.6 ± 1.0 ly
(73.8 ± 0.3 pc)
Absolute magnitude (MV)3.50[4]
Details
Mass1.23±0.16[5] M☉
Radius2.01±0.04[5] R☉
Luminosity3.14±0.02[1] L☉
Surface gravity (log g)3.82[4] cgs
Temperature5,414±97[1] K
Metallicity [Fe/H]0.26[4] dex
Rotational velocity (v sin i)4.9[4] km/s
Age5.08[4] Gyr
Other designations
BD+18 2326, HD 88133, HIP 49813, SAO 98978, LTT 12725, NLTT 23562, TYC 1422-1130-1, 2MASS J10100767+1811132[6]
Database references
SIMBADdata

Planetary system


In 2004 a planet was found to orbit the star utilizing a radial velocity method.[7] In 2016 the direct detection of the planetary thermal emission spectrum was claimed,[8] but the detection was questioned in 2021.[9]

The HD 88133 planetary system[10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥0.282±0.046 MJ 0.0479±0.0032 3.414887±0.000045 0 (fixed) — —

See also



References


  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  3. Grieves, N.; et al. (December 2018). "Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey". Monthly Notices of the Royal Astronomical Society. 481 (3): 3244–3265. arXiv:1803.11538. Bibcode:2018MNRAS.481.3244G. doi:10.1093/mnras/sty2431.
  4. Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal. 153 (1): 19. arXiv:1611.02897. Bibcode:2017AJ....153...21L. doi:10.3847/1538-3881/153/1/21. S2CID 119511744. 21.
  5. Stassun, Keivan G.; et al. (March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal. 153 (3): 20. arXiv:1609.04389. Bibcode:2017AJ....153..136S. doi:10.3847/1538-3881/aa5df3. S2CID 119219062. 136.
  6. "HD 88133". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-12-28.
  7. Fischer, Debra A.; et al. (2005). "The N2K Consortium. I. A Hot Saturn Planet Orbiting HD 88133". The Astrophysical Journal. 620 (1): 481–486. Bibcode:2005ApJ...620..481F. doi:10.1086/426810.
  8. Piskorz, Danielle; et al. (23 November 2016). "Evidence for the Direct Detection of the Thermal Spectrum of the Non-Transiting Hot Gas Giant HD 88133 b". The Astrophysical Journal. 832 (2). 131. arXiv:1609.09074. Bibcode:2016ApJ...832..131P. doi:10.3847/0004-637X/832/2/131.
  9. Buzard, Cam; et al. (29 November 2021). "Reinvestigation of the Multiepoch Direct Detections of HD 88133 b and Upsilon Andromedae b". The Astronomical Journal. 162 (6). 269. arXiv:2109.13275. Bibcode:2021AJ....162..269B. doi:10.3847/1538-3881/ac2a2c.
  10. Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5. S2CID 119243619.


На других языках

[de] HD 88133

HD 88133 ist ein etwa 270 Lichtjahre von der Erde entfernter Unterriese im Sternbild Leo. Er besitzt eine scheinbare Helligkeit von 8,0 mag. Im Jahre 2004 entdeckten Fischer et al. einen extrasolaren Planeten, der diesen Stern umkreist. Dieser trägt den Namen HD 88133 b.
- [en] HD 88133


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