HD 102365

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Template:Short description

HD 102365
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus[1]
A
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.88[3]
B
Right ascension Template:RA[4]
Declination Template:DEC[4]
Apparent magnitude (V) 15[5]
Characteristics
Spectral type G2V[6] + M4V[7]
U−B Template:Engvar 0.10[3]
B−V Template:Engvar 0.67[3]
Astrometry
A
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: −1530.971 mas/yr[2]
Dec.: +403.287 mas/yr[2]
Parallax (π)107.3024±0.0873 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)5.07[8]
B
Radial velocity (Rv)Script error: No such module "val".[4] km/s
Proper motion (μ) RA: −1534.679 mas/yr[4]
Dec.: +381.396 mas/yr[4]
Parallax (π)107.4237±0.0351 mas[4]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Details
A
MassScript error: No such module "val".[9] Template:Solar mass
RadiusScript error: No such module "val".[9] Template:Solar radius
LuminosityScript error: No such module "val".[9] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[9] cgs
TemperatureScript error: No such module "val".[9] K
Metallicity [Fe/H]−0.28[10] dex
Rotational velocity (v sin i)0.5[11] km/s
Age4.5–5.7[12] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[13][14]
B: Template:Odlist, VB 5
Database references
SIMBADA
B
Exoplanet Archivedata
ARICNSdata

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HD 102365 (66 G. Centauri) is a binary star system that is located in the northeastern part of the Centaurus constellation, at a distance of about Script error: No such module "convert". from the Solar System. The larger member of the system is a G-type star that is smaller than the Sun but of similar mass. It has a common proper motion companion that was discovered by W. J. Luyten in 1960.[7] This M-type star appears to be in a wide orbit around the primary at a current separation of about 211 astronomical units (AU),[7] (or 211 times the separation of the Earth from the Sun). By comparison, Neptune orbits at an average distance of 30 AU.

Description

The stellar classification for the primary star in this system is G2V;[6] the same as the Sun. That of the red dwarf companion is M4V.[7] The primary star has an estimated 84% the mass of the Sun, 99% of the Sun's radius, and 86% of the Sun's luminosity.[9] It is a slow rotator, with a projected rotational velocity of 0.5 km/s.[11] Age estimates range from 4.5 to 5.7 billion years (Gyr)[12] up to 7.1 Gyr[8] or 9.48 Gyr.[15] Compared to the Sun, it only has about 52% of the abundance of elements other than hydrogen and helium; what astronomers term the metallicity of a star.[16]

This star system has a relatively large proper motion.[13] The HR 4523 system is presently located within the Epsilon Indi Moving Group, although it gives itself away as an interloper, since the star is older and has a different composition than the group members.[17] It has space velocity components [U, V, W] = [−67, −40, +4] km/s.[18]

Planetary system

The primary star is believed to be orbited by a Neptune-like planet with a minimum mass 16 times that of the Earth. The orbital period of this planet is 122.1 days. No other planets have been discovered orbiting this star.[19] While a 2013 study was unable to confirm this planet,[20] it was confirmed by a 2023 study.[21]Template:Rp

An examination of this system in the infrared did not reveal an excess emission that would otherwise suggest the presence of a circumstellar debris disk.[22]

Template:OrbitboxPlanet begin Template:OrbitboxPlanet

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References

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  1. ↑ Template:Cite constellation
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c Script error: No such module "citation/CS1".
  4. ↑ a b c d e Template:Cite Gaia DR3
  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "citation/CS1".
  7. ↑ a b c d Script error: No such module "citation/CS1". For the adopted physical separation, see Table 11 in the appendix.
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ a b c d e f Script error: No such module "citation/CS1".
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ a b Script error: No such module "citation/CS1".Script error: No such module "Unsubst".
  12. ↑ a b Script error: No such module "citation/CS1".
  13. ↑ a b Template:Cite simbad
  14. ↑ Script error: No such module "Citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ For a metallicity of [Fe/H] = −0.28 dex, the proportion of metals is given by 10−0.28, or 52%.
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ Script error: No such module "Citation/CS1".
  21. ↑ Script error: No such module "Citation/CS1".
  22. ↑ Script error: No such module "citation/CS1".

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External links

  • Script error: No such module "citation/CS1".

Template:Stars of Centaurus

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