HD 7449

HD 7449
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 01h 14m 29.32229s[1]
Declination −05° 02′ 50.6148″[1]
Apparent magnitude (V) 7.50[2]
Characteristics
Spectral type F9.5V[2] + M4.5[3]
B−V color index 0.575±0.007[2]
Astrometry
Radial velocity (Rv)−19.60±0.13[1] km/s
Proper motion (μ) RA: −164.544±0.039 mas/yr[1]
Dec.: −134.382±0.028 mas/yr[1]
Parallax (π)25.9132 ± 0.0287 mas[1]
Distance125.9 ± 0.1 ly
(38.59 ± 0.04 pc)
Absolute magnitude (MV)4.55[2]
Orbit[4]
PrimaryHD 7449 A
CompanionHD 7449 B
Period (P)175.310+43.633
−34.380 yr
Semi-major axis (a)34.655+5.498
−4.781 AU
Eccentricity (e)0.301+0.084
−0.102
Inclination (i)68.400+4.103
−3.887°
Longitude of the node (Ω)325.935+2.865
−2.404°
Periastron epoch (T)2391480.709+12803.765
−15269.796
Argument of periastron (ω)
(secondary)		201.186+12.830
−13.166°
Semi-amplitude (K1)
(primary)		0.720525+0.043724
−0.029891 km/s
Details[5]
HD 7449 A
Mass1.05±0.02 M☉
Radius1.02±0.02 R☉
Luminosity1.26±0.02 L☉
Surface gravity (log g)4.44±0.02 cgs
Temperature6060±42 K
Metallicity−0.11±0.01[6]
Age2.2±1.3 Gyr
HD 7449 B
Mass0.23+0.22
−0.05[3] M☉
Mass178.151+16.614
−13.664[4] MJup
Temperature3000 K
Other designations
BD−05 215, HD 7449, HIP 5806, TYC 4683-883-1, 2MASS J01142933-0502504[7]
Database references
SIMBADdata

HD 7449 is a binary star system about 126 light-years way. The primary star, HD 7449 A, is a main-sequence star belonging to the spectral class F9.5. It is younger than the Sun. The primary star is slightly depleted of heavy elements, having 80% of solar abundance.[6]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Rodigas2015 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Feng2022 was invoked but never defined (see the help page).
  5. ^ Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016), "Age consistency between exoplanet hosts and field stars", Astronomy & Astrophysics, 585: A5, arXiv:1511.01744, Bibcode:2016A&A...585A...5B, doi:10.1051/0004-6361/201527297, S2CID 53971692
  6. ^ a b Cite error: The named reference Dumusque2011 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).