HD 326823

HD 326823

A visual band light curve for V1104 Scorpii, plotted from ASAS-SN data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Scorpius
Right ascension 17h 06m 53.9045s[2]
Declination −42° 36′ 39.704″[2]
Apparent magnitude (V) 9.03[3]
Characteristics
Spectral type WNpec[4]
U−B color index -0.19[3]
B−V color index 0.84[3]
Astrometry
Proper motion (μ) RA: +2.545[2] mas/yr
Dec.: −2.251[2] mas/yr
Parallax (π)0.6919 ± 0.0193 mas[2]
Distance1,270[5] pc
Orbit[6]
Period (P)6.1228 days
Eccentricity (e)0.17
Inclination (i)45°
Argument of periastron (ω)
(secondary)		197±14°
Semi-amplitude (K1)
(primary)		230±12.7 km/s
Details
WN
Mass5.5[6] M☉
Radius19.51[a] R☉
Luminosity80,000[5] L☉
Temperature22,000[5] K
O
Mass29.1[6] M☉
Radius10[6] R☉
Other designations
V1104 Scorpii, 2MASS J17065390-4236397
Database references
SIMBADdata

HD 326823, also known as V1104 Scorpii, is a binary star containing a unique emission-line star, which is in the midst of transitioning to a nitrogen-rich Wolf-Rayet star, as well as being a candidate Luminous blue variable, located 4,142 light years away in the constellation of Scorpius. The primary is very evolved, because it is composed of almost entirely helium, and only 3% of it is still hydrogen,[4] and it has lost most of its mass to the now-very-massive secondary. The underlying mechanisms and mass transfers in the system are comparable to other W Serpentis systems, such as Beta Lyrae and RY Scuti.[4]

  1. ^ Cite error: The named reference ASAS-SN was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference edr3 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference ducati was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference marcolino was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference smith was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference richardson was invoked but never defined (see the help page).


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