HD 25171

HD 25171
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Reticulum
Right ascension 03h 55m 49.440s[1]
Declination –65° 11′ 12.03″[1]
Apparent magnitude (V) 7.79[2]
Characteristics
Spectral type F8 V[2]
B−V color index 0.554[2]
Astrometry
Radial velocity (Rv)+42.8[3] km/s
Proper motion (μ) RA: +144.020 mas/yr[1]
Dec.: +81.550 mas/yr[1]
Parallax (π)17.928 ± 0.0163 mas[4]
Distance181.9 ± 0.2 ly
(55.78 ± 0.05 pc)
Absolute magnitude (MV)4.09±0.07[2]
Details
Mass1.09±0.03[2] M☉
Radius1.069±0.041[5] R☉
Luminosity1.89[2] L☉
Surface gravity (log g)4.17±0.1[5] cgs
Temperature6,063±50[5] K
Metallicity [Fe/H]−0.11±0.04[2] dex
Rotation14.4±0.6 d[6]
Rotational velocity (v sin i)1.0[2] km/s
Age4.0±1.6[2] Gyr
Other designations
CD–65 199, HD 25171, HIP 9141, SAO 248911[7]
Database references
SIMBADdata

HD 25171 is a star with an orbiting exoplanet[8] in the southern constellation of Reticulum, the reticle. With an apparent visual magnitude of 7.79,[2] this star is too faint to be viewed with the naked eye. However, it is readily visible through a small telescope from the southern hemisphere. Parallax measurements place it at a distance of roughly 182 light-years (56 parsecs) from Earth. It is drifting further away with a heliocentric radial velocity of +43 km/s.[3]

Based upon its spectrum, this is an ordinary F-type main sequence star with a stellar classification of F8 V. It is slightly larger than the Sun, with 9% more mass and an 7% greater radius. As such, it is radiating 189% of the Sun's luminosity from its outer atmosphere at an effective temperature of 6,063 K. This gives it the yellow-white hued glow of an F-type star. It appears to be roughly the same age as the Sun; around four billion years.[5][2]

A survey in 2015 ruled out the existence of any stellar companions at projected distances above 26 astronomical units.[9]

  1. ^ a b c Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k Cite error: The named reference aaa527_A63 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference aaa501_3_941 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Buchhave2018 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Mascareno2017 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ HD 25171 System
  9. ^ Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3): 3127–3136. Bibcode:2015MNRAS.450.3127M. doi:10.1093/mnras/stv771. hdl:1887/49340. Retrieved 19 June 2020.