HD 114533

HD 114533
Location of HD 114533 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 13h 14m 17.3297s[1]
Declination −78° 26′ 50.8362″[1]
Apparent magnitude (V) 5.84±0.01[2]
Characteristics
Spectral type G2 Ib[3]
U−B color index +0.72[4]
B−V color index +1.07[4]
Astrometry
Radial velocity (Rv)−17.9±0.3[5] km/s
Proper motion (μ) RA: −9.435[1] mas/yr
Dec.: −4.222[1] mas/yr
Parallax (π)1.5528 ± 0.0359 mas[1]
Distance2,100 ± 50 ly
(640 ± 10 pc)
Absolute magnitude (MV)−2.0[6]
Details
Mass3.78[7] M☉
Radius77.3±4.0[8] R☉
Luminosity2,383±110[9] L☉
Surface gravity (log g)1.21[7] cgs
Temperature4,514+372
−274[10] K
Metallicity [Fe/H]−0.04+0.01
−0.00[1] dex
Rotational velocity (v sin i)9.2±1[11] km/s
Other designations
44 G. Chamaeleontis[12], CPD−77°890, FK5 3054, GC 17886, HD 114533, HIP 64587, HR 4976, SAO 257019[13]
Database references
SIMBADdata

HD 114533, also known as HR 4976, is a solitary star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 5.84, making it faintly visible to the naked eye. The system is located relatively far at a distance of roughly 2,100 light years based on Gaia DR3 parallax measurements but is drifting closer with a heliocentric radial velocity of −18 km/s. At its current distance, HD 114533A's brightness is diminished by 0.74 magnitudes due to interstellar dust.[14] It has an absolute magnitude of −2.0.[6]

This is an evolved supergiant with a stellar classification of G2 Ib.[3] It has also been given class of F8 Ib,[15] indicating a slightly hotter star. It has 3.78 times the mass of the Sun[7] but has expanded to 77.3 times its girth.[8] HD 114533 radiates over 2,000 times the bolometric luminosity[9] of the Sun from its enlarged photosphere at an effective temperature of 4,514 K,[10] giving it a yellowish-orange hue. The object has a near-solar metallicity[1] and spins modestly with a projected rotational velocity of 9.2 km/s.[11]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Ammons2006 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference De Mederios2002 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Guarinos1995 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Malaroda1975 was invoked but never defined (see the help page).