LH 54-425

LH 54-425

LH 54-425 is the bright star on the left. NGC 1955 is the cluster in the middle, dominated by the B0 supergiant HD 269925. The bright star on the right is the Wolf–Rayet/O-supergiant binary HD 36402.
Observation data
Epoch J2000      Equinox J2000
Constellation Dorado
Right ascension 05h 26m 24.2505s[1]
Declination −67° 30′ 17.194″[1]
Apparent magnitude (V) 13.13[2]
Characteristics
Spectral type O3V + O5V[3]
U−B color index +0.01[4]
B−V color index −0.31[4]
Orbit[3]
Period (P)2.2474 days[5]
Semi-major axis (a)30.4 R☉
Eccentricity (e)0
Inclination (i)55°
Semi-amplitude (K1)
(primary)		201.6 km/s
Semi-amplitude (K2)
(secondary)		359.1 km/s
Details[3]
O3
Mass47 M☉
Radius11.4 R☉
Luminosity500,000 L☉
Surface gravity (log g)4.00 cgs
Temperature45,000 K
Rotational velocity (v sin i)197 km/s
O5
Mass28 M☉
Radius8.1 R☉
Luminosity160,000 L☉
Surface gravity (log g)4.07 cgs
Temperature41,000 K
Rotational velocity (v sin i)182 km/s
Age2.0[6] Myr
Database references
SIMBADdata

LH 54-425 is a spectroscopic binary star system in the LH 54 OB association within the Large Magellanic Cloud in the constellation Dorado.

  1. ^ a b Cite error: The named reference Bonanos_et_al_2009 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference oey was invoked but never defined (see the help page).
  3. ^ a b c Williams, S. J.; Gies, D. R.; Henry, T. J.; Orosz, J. A.; McSwain, M. V.; Hillwig, T. C.; Penny, L. R.; Sonneborn, G.; Iping, R.; Van Der Hucht, K. A.; Kaper, L. (2008). "Dynamical Masses for the Large Magellanic Cloud Massive Binary System [L72] LH 54-425". The Astrophysical Journal. 682 (1): 492–498. arXiv:0802.4232. Bibcode:2008ApJ...682..492W. doi:10.1086/589687. S2CID 118867799.
  4. ^ a b Cite error: The named reference hill was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Ostrov2002 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference massey was invoked but never defined (see the help page).