WR 102 information

WR 102
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Sagittarius
Right ascension	17h 45m 47.541s
Declination	−26° 10′ 27.78″
Apparent magnitude (V)	14.10
Characteristics
Evolutionary stage	Wolf–Rayet star
Spectral type	WO2
B−V color index	+0.77
Astrometry
Proper motion (μ)	RA: +0.672 mas/yr ; Dec.: −0.059 mas/yr
Parallax (π)	0.3421 ± 0.0208 mas
Distance	9,500 ± 600 ly ; (2,900 ± 200 pc)
Absolute magnitude (MV)	−1.46
Details
Mass	16.1+1.7; −1.4 M☉
Radius	0.52 R☉
Luminosity	380,000 L☉
Temperature	200,000 K
Metallicity [Fe/H]	0.0 dex
Other designations
	V3893 Sagittarii, LS 4368, ALS 4368, Sand 4
Database references
SIMBAD	data

WR 102 is a Wolf–Rayet star in the constellation Sagittarius, an extremely rare star on the WO oxygen sequence. It is a luminous and very hot star, highly evolved and close to exploding as a supernova.

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[wc-2] Cite error: The named reference wc was invoked but never defined (see the help page).

[wo-3] Cite error: The named reference wo was invoked but never defined (see the help page).

[smith-4] Cite error: The named reference smith was invoked but never defined (see the help page).

[sander2019-5] Cite error: The named reference sander2019 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Sagittarius
Right ascension	17^h 45^m 47.541^s^[1]
Declination	−26° 10′ 27.78″^[1]
Apparent magnitude (V)	14.10^[2]
Characteristics
Evolutionary stage	Wolf–Rayet star
Spectral type	WO2^[3]
B−V color index	+0.77^[4]
Astrometry

Proper motion (μ)	RA: +0.672^[1] mas/yr Dec.: −0.059^[1] mas/yr
Parallax (π)	0.3421 ± 0.0208 mas^[1]
Distance	9,500 ± 600 ly (2,900 ± 200 pc)
Absolute magnitude (M_V)	−1.46^[5]

Details

Mass	16.1+1.7 −1.4^[5] `M`_☉
Radius	0.52^[5] `R`_☉
Luminosity	380,000^[5] `L`_☉
Temperature	200,000^[5] K
Metallicity [Fe/H]	0.0^[3] dex

Other designations
V3893 Sagittarii, LS 4368, ALS 4368, Sand 4
Database references
SIMBAD	data

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