HD 4113

HD 4113
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sculptor
HD 4113 A
Right ascension 00h 43m 12.59559s[1]
Declination −37° 58′ 57.4777″[1]
Apparent magnitude (V) 7.880±0.013[2]
HD 4113 B
Right ascension 00h 43m 11.89423s[3]
Declination −37° 58′ 09.1687″[3]
Apparent magnitude (V) 12.70±0.02[2]
Characteristics
Spectral type G5V and M0–1V[2]
B−V color index 0.716±0.003[2]
Astrometry
HD 4113 A
Radial velocity (Rv)5.05±0.12[1] km/s
Proper motion (μ) RA: 49.412±0.016 mas/yr[1]
Dec.: −114.290±0.024 mas/yr[1]
Parallax (π)23.8256 ± 0.0240 mas[1]
Distance136.9 ± 0.1 ly
(41.97 ± 0.04 pc)
Absolute magnitude (MV)4.780±0.046[2]
HD 4113 B
Radial velocity (Rv)4.44±0.39[3] km/s
Proper motion (μ) RA: 53.733±0.022 mas/yr[3]
Dec.: −113.983±0.032 mas/yr[3]
Parallax (π)23.9023 ± 0.0327 mas[3]
Distance136.5 ± 0.2 ly
(41.84 ± 0.06 pc)
Absolute magnitude (MV)9.600±0.049[2]
Orbit[4]
CompanionHD 4113 C
Period (P)348.325+21.932
−15.139
yr
Semi-major axis (a)50.438+2.060
−1.420
 AU
Eccentricity (e)0.648+0.008
−0.007
Inclination (i)83.456+2.342
−1.269
°
Longitude of the node (Ω)225.686+0.704
−1.486
°
Periastron epoch (T)2324305.035+127045.323
−7894.349
Argument of periastron (ω)
(secondary)
249.665+3.552
−4.805
°
Semi-amplitude (K1)
(primary)
0.263535+0.002058
−0.003037
km/s
Details[5]
A
Mass1.02+0.02
−0.03
 M
Radius1.08+0.02
−0.04
[6] R
Luminosity1.085+0.04
−0.03
[6] L
Surface gravity (log g)4.31±0.04 cgs
Temperature5,638±50 K
Metallicity [Fe/H]0.20±0.04 dex
Rotational velocity (v sin i)2.324[2] km/s
Age7.29+1.91
−1.46
or 5.0+1.3
−1.7
[2] Gyr
B
Mass0.55[2] M
Surface gravity (log g)4.76[2] cgs
Temperature3,833[2] K
C
Mass51.913+0.604
−0.458
[4] MJup
Other designations
CD−38°223, GC 858, HD 4113, HIP 3391, SAO 192693, GSC 03654-02131[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 4113 is a dual star system in the southern constellation of Sculptor. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.88.[2] The distance to this star, as estimated by parallax measurements, is 137 light years.[1] It is receding away from the Sun with a radial velocity of +5 km/s.[1]

The primary member of this system, component A, is a Sun-like G-type main-sequence star with a stellar classification of G5V.[2] Estimates of its age are five[2] to seven[5] billion years old, and it is spinning with a leisurely projected rotational velocity of 2.3 km/s.[2] The star is metal rich, with nearly the same mass,[5] radius, and luminosity[6] as the Sun.

Orbiting this star is a giant planet and a brown dwarf (HD 4113 C); the latter has been directly imaged. It also has a co-moving stellar companion, designated component B, which is a red dwarf with a class of M0–1V at an angular separation of 43. This angle is equivalent to a projected separation of 2,000 AU.[2]

The most recent parameters for HD 4113 C as of 2022 come from a combination of data from radial velocity, astrometry, and imaging, showing that it is about 52 times the mass of Jupiter, and on an eccentric orbit with a semi-major axis of about 50.4 AU and an orbital period of about 348 years.[4]

  1. ^ a b c d e f g Cite error: The named reference Gaia DR3 A was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k l m n o p Cite error: The named reference Cheetham2018 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Gaia DR3 B was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Feng2022 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference AguileraGómez2018 was invoked but never defined (see the help page).
  6. ^ a b c 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.
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).