HD 29573

HD 29573
Observation data
Epoch J2000      Equinox J2000
Constellation Eridanus
Right ascension 04h 38m 53.55015s[1]
Declination −12° 07′ 23.0681″[1]
Apparent magnitude (V) 4.99[2] (5.19 + 7.22)[3]
Characteristics
Spectral type A0 V (A1 + F2)[2]
B−V color index 0.074±0.003[4]
Astrometry
Radial velocity (Rv)+2.9±0.8[5] km/s
Proper motion (μ) RA: −60.614[1] mas/yr
Dec.: −16.417[1] mas/yr
Parallax (π)14.2348 ± 0.3656 mas[1]
Distance229 ± 6 ly
(70 ± 2 pc)
Absolute magnitude (MV)0.73[4]
Orbit[2]
Period (P)40.9±1.386 yr
Semi-major axis (a)0.2844±0.0055″
Eccentricity (e)0.759±0.180
Inclination (i)75.5±2.2°
Longitude of the node (Ω)152.0±1.8°
Periastron epoch (T)2003.805
Argument of periastron (ω)
(secondary)		284.1±11.0°
Details
HD 29573 A
Mass2.28[2] M☉
Luminosity51.8+4.6
−4.3[6] L☉
Temperature8,892+103
−102[6] K
Rotational velocity (v sin i)27[6] km/s
HD 29573 B
Mass1.56[2] M☉
Other designations
BD−12° 955, GJ 9161, HD 29573, HIP 21644, HR 1483, SAO 149789, WDS J04389-1207AB[7]
Database references
SIMBADdata

HD 29573 is a binary star[3] system in the constellation Eridanus. It has a combined apparent visual magnitude of 4.99,[2] making it visible to the naked eye. Based upon an annual parallax shift of 14.23 mas,[1] it is located 229 light years from the Sun. The system is moving further away from Earth with a heliocentric radial velocity of +3 km/s.[5]

The binary nature of this system was discovered through observations made with the Hipparcos spacecraft. The pair orbit each other with a period of 41 years and an eccentricity of 0.8.[2] The magnitude 5.19[3] primary component has a class of A1,[2] 2.28[2] times the mass of the Sun, and is a suspected chemically peculiar star.[8] The secondary has magnitude 7.22,[3] 1.56[2] times the Sun's mass, and a class of F2.[2] The system has a possible infrared excess[9] due to circumstellar dust.[10]

  1. ^ a b c d e f 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 Cvetkovic2014 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference zorec2012 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. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Shylaja2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Kamp2002 was invoked but never defined (see the help page).