WR 102ka

WR 102ka

The "Peony Nebula," as discovered by NASA's Spitzer Space Telescope. This three-color infrared composite shows 3.6-micrometre light in blue, 8-micrometre light in green, and 24-micrometre light in red. The Peony nebula is the reddish cloud of dust in and around the white circle, surrounding the Peony nebular star.
Observation data
Epoch J2000.      Equinox J2000.
Constellation Sagittarius
Right ascension 17h 46m 18.12s[1]
Declination −29° 01′ 36.5″[1]
Characteristics
Evolutionary stage Slash star
Spectral type Ofpe/WN9[2]
Apparent magnitude (J) 13.0[1]
Apparent magnitude (H) 10.3[1]
Apparent magnitude (K) 8.8[1]
J−H color index 2.7[1]
J−K color index 4.2[1]
Variable type
Astrometry
Distance26,000[2] ly
(8,000[2] pc)
Details
Mass~100[3] M☉
Radius92[2] R☉
Luminosity2,950,000[3] L☉
Temperature25,100[2][3] K
Age~2[3] Myr
Other designations
Peony Star,[4] Peony nebula star, WR 102ka, 2MASS J17461811-2901366, ISOGAL-P J174618.2-290136, MSX6C G000.0003-00.1743
Database references
SIMBADdata

WR 102ka, also known as the Peony star, is a slash star that is one of several candidates for the most luminous-known star in the Milky Way.[5]

  1. ^ a b c d e f g Cite error: The named reference 2mass was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference barniske was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference oskinova was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference peony was invoked but never defined (see the help page).
  5. ^ Steinke, M.; Oskinova, L. M.; Hamann, W. -R.; Sander, A. (2015-01-01). "The Wolf-Rayet stars WR102c and 102ka and their isolation". Wolf-Rayet Stars: 365. Bibcode:2015wrs..conf..365S.