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- WR_102ka abstract "WR 102ka also known as the Peony star is a Wolf-Rayet star that is one of several candidates for the most luminous known star in the Milky Way. The nearer star Eta Carinae, which was the second brightest star in the sky for a few years in the 19th century, appears to be slightly more luminous than WR 102ka, but it is known to be a binary star system. There is also the more recently discovered Pistol star which, like the Peony star, derives its name from the shape of the nebula it is embedded in and which has probably created through heavy mass loss via fierce stellar winds and perhaps also major "mini-supernova-like" eruptions as happened to Eta Carinae around the 1830s-1840s creating the lobes observed by the Hubble Space Telescope.The luminosities of the Pistol Star, Eta Carinae and WR 102ka are all rendered somewhat uncertain due to heavy obscuration by galactic dust in the foreground, the effects of which must be corrected for before their apparent brightness can be reduced to estimate their physical radiated power, or "bolometric luminosity".Both Eta Carinae and WR 102ka are believed likely to explode as supernovas or hypernovas within the next few million years.As is typical of such extremely massive and luminous stars, both have expelled a considerable portion of their initial mass, when originally formed, in dense, massive stellar winds.Because WR 102ka lies near the Galactic Center, it is the more distant and heavily obscured of the two, and is essentially totally obscured in visible wavelengths. Thus it must be observed in longer wavelength infrared light, which is able to penetrate the dust. The Spitzer Space Telescope observed WR 102ka at wavelengths of 3.6 µm, 8 µm, and 24 µm on April 20, 2005. The observations were carried out by L. Oskinova, W.-R. Hamann, and A. Barniske of Potsdam University, Germany.WR 102ka was previously observed by the Two Micron All Sky survey (2MASS) in the near-infrared J, H, and Ks bands, at 1.2 µm, 1.58 µm, and 2.2 µm, respectively.".
- WR_102ka thumbnail Peony_nebula.jpg?width=300.
- WR_102ka wikiPageExternalLink sim-id?Ident=WR+102ka&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- WR_102ka wikiPageExternalLink bright-stars.html.
- WR_102ka wikiPageID "18451343".
- WR_102ka wikiPageRevisionID "602227820".
- WR_102ka age "< 3 million".
- WR_102ka appmag "10.3".
- WR_102ka appmag "13".
- WR_102ka appmag "8.8".
- WR_102ka appmag1Passband "J".
- WR_102ka appmag2Passband "H".
- WR_102ka appmag3Passband "K".
- WR_102ka class "Ofpe/WN9".
- WR_102ka constell "Sagittarius".
- WR_102ka epoch "J2000.".
- WR_102ka hasPhotoCollection WR_102ka.
- WR_102ka jH "2.7".
- WR_102ka jK "4.2".
- WR_102ka luminosity "3200000".
- WR_102ka mass "approx. initial mass 175".
- WR_102ka radius "92".
- WR_102ka source sim-id?Ident=WR+102ka&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- WR_102ka temperature "25100".
- WR_102ka type Slash_star.
- WR_102ka subject Category:Objects_within_100_kly_of_Earth.
- WR_102ka subject Category:Sagittarius_(constellation).
- WR_102ka subject Category:Wolf–Rayet_stars.
- WR_102ka type CelestialBody.
- WR_102ka type Star.
- WR_102ka type PhysicalBody.
- WR_102ka comment "WR 102ka also known as the Peony star is a Wolf-Rayet star that is one of several candidates for the most luminous known star in the Milky Way. The nearer star Eta Carinae, which was the second brightest star in the sky for a few years in the 19th century, appears to be slightly more luminous than WR 102ka, but it is known to be a binary star system.".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "WR 102ka".
- WR_102ka label "نجم عود الصليب".
- WR_102ka sameAs WR_102ka.
- WR_102ka sameAs WR_102ka.
- WR_102ka sameAs WR_102ka.
- WR_102ka sameAs WR_102ka.
- WR_102ka sameAs WR_102ka.
- WR_102ka sameAs WR_102ka.
- WR_102ka sameAs m.04dz_gf.
- WR_102ka sameAs Q1326804.
- WR_102ka sameAs Q1326804.
- WR_102ka wasDerivedFrom WR_102ka?oldid=602227820.
- WR_102ka depiction Peony_nebula.jpg.
- WR_102ka isPrimaryTopicOf WR_102ka.
- WR_102ka name "WR 102ka".