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HD 88133

Coordinates: Sky map 10h 10m 07.68s, +18° 11′ 12.74″
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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

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.

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. ^ a b c d e f g h 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. ^ a b 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.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  4. ^ a b c d e 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.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  5. ^ a b 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.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  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.


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