HD 115404

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Template:Short description

HD 115404
Observation data
Epoch J2000      Equinox J2000
Constellation Coma Berenices
HD 115404 A
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 6.66[2]
HD 115404 B
Right ascension Template:RA[3]
Declination Template:DEC[3]
Apparent magnitude (V) 9.50[2]
Characteristics
U−B Template:Engvar +0.64[4]
B−V Template:Engvar +0.92[4]
HD 115404 A
Spectral type K2 V[5]
HD 115404 B
Spectral type M0.5 V[6]
Astrometry
HD 115404 A
Radial velocity (Rv)7.62 ± 0.09[7] km/s
Proper motion (μ) RA: Script error: No such module "val". mas/yr[1]
Dec.: Script error: No such module "val". mas/yr[1]
Parallax (π)91.0176±0.0236 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
HD 115404 B
Radial velocity (Rv)Script error: No such module "val".[3] km/s
Proper motion (μ) RA: Script error: No such module "val". mas/yr[3]
Dec.: Script error: No such module "val". mas/yr[3]
Parallax (π)90.9475±0.0232 mas[3]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Orbit[8]
Period (P)770.0 yr
Semi-major axis (a)8.06″
Eccentricity (e)0.12
Inclination (i)93.41°
Longitude of the node (Ω)104.66°
Periastron epoch (T)B 1875.0
Argument of periastron (ω)
(secondary)		276.99°
Details
HD 115404 A
Mass0.70 ± 0.09[9] Template:Solar mass
Radius0.76 ± 0.02[9] Template:Solar radius
Luminosity3.1[9] Template:Solar luminosity
Surface gravity (log g)4.58 ± 0.03[9] cgs
Temperature4976[9] K
Metallicity [Fe/H]−0.08[9] dex
Rotational velocity (v sin i)2.8[9] km/s
Age10.2 (5.4–13.5)[9] Gyr
HD 115404 B
Mass0.542[10] Template:Solar mass
Radius0.550[10] Template:Solar radius
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[11]
Database references
SIMBADA
B
ARICNSA
B

Script error: No such module "Check for unknown parameters".

HD 115404 is a binary star system located in the constellation Coma Berenices. Parallax measurements made by Hipparcos put the system at 36 light-years, or 11 parsecs, away.[12] The combined apparent magnitude of the system is 6.52,[11] with the magnitudes of the components being 6.66 and 9.50.[2]

The primary component, designated A, is a K-type main sequence star.[5] It is about 70% as massive as the Sun, and is 0.76 times as wide.[9] Its companion is a red dwarf (M0.5 V).[6] It has 54.2% the mass of the Sun, and is 0.55 times as wide.[10] The two stars orbit each other every 770 years, and are separated by about 8Template:Pprime.[8] The system is thought to be fairly old, at 5.4 to 13.5 billion years old.[9]

In 2022, two exoplanets, Neptunian and super-Jovian in mass, were discovered in orbit around the primary star using a combination of radial velocity and astrometry.[13]

The HD 115404 A planetary system[13]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b Script error: No such module "val". [[Jupiter mass|Template:MvarJ]] Script error: No such module "val". Script error: No such module "val". Script error: No such module "val". — —
c Script error: No such module "val". [[Jupiter mass|Template:MvarJ]] Script error: No such module "val". Script error: No such module "val". Script error: No such module "val". Script error: No such module "val".° —

Script error: No such module "Check for unknown parameters".

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ a b c d Template:Cite Gaia DR3
  2. ↑ a b c Script error: No such module "Citation/CS1".
  3. ↑ a b c d e Template:Cite Gaia DR3
  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ a b Script error: No such module "Citation/CS1".
  6. ↑ a b Script error: No such module "Citation/CS1".Script error: No such module "Unsubst".
  7. ↑ Script error: No such module "Citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ a b c d e f g h i j Script error: No such module "Citation/CS1".
  10. ↑ a b c Script error: No such module "Citation/CS1".
  11. ↑ a b Template:Cite simbad
  12. ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
  13. ↑ a b Script error: No such module "Citation/CS1".

Script error: No such module "Check for unknown parameters".

Template:Stars of Coma Berenices

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=HD_115404&oldid=6040860"