| 词条 | K 1-2 |
| 释义 |
| image = | name = Planetary Nebula K 1-2 | type = | epoch = J2000.0 | ra = {{RA|08|57|45.99}} | dec = {{DEC|-28|57|36.8}} | dist_ly = | appmag_v = | size_v = | constellation = Pyxis | radius_ly = - | absmag_v = - | notes = - | names = VW Pyxidis (central star), IRAS 08556-2846 }}K1-2 is a planetary nebula in the constellation Pyxis. It was discovered by Czech astronomer Luboš Kohoutek in 1961.[1] The central star of the nebula—VW Pyxidis—is a post-common-envelope binary composed of a hot degenerate star and a cooler companion in a close orbit. A best-fit calculation from its orbit and spectra yields a white dwarf-like star with around 50% of the Sun's mass and a main sequence lie star around 70% as massive as the Sun. Jets of matter are emanating from the system. One study yielded a surface temperature of 85,000 K for the hotter star.[2] References1. ^{{cite journal|title=New planetary nebulae|author=Kohoutek, Luboš |journal=Bulletin of the Astronomical Institute of Czechoslovakia | volume= 13 | page=120 |year=1962 |bibcode=1962BAICz..13..120K}} {{nebula-stub}}2. ^{{cite journal|title=The planetary nebula K 1-2 and its binary central star VW Pyx |author1=Exter, K. M. |author2=Pollacco, D. L. |author3=Bell, S. A. | journal=Monthly Notices of the Royal Astronomical Society |volume = 341 |issue=4 |pages= 1349–59 |year=2003 | doi=10.1046/j.1365-8711.2003.06505.x |bibcode=2003MNRAS.341.1349E}} 2 : Planetary nebulae|Pyxis (constellation) |
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