NGC 6881 is a planetary nebula, located in the constellation of Cygnus. It is formed of an inner nebula, estimated to be about one fifth of a light-year across, and a symmetrical structure that spreads out about one light-year from one tip to the other. The symmetry could be due to a binary star at the nebula's centre.

References

  1. ^ a b c "NGC 6881". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 March 2012.
  2. ^ Guzmán-Ramírez, Lizette; Gómez, Yolanda; Loinard, Laurent; Tafoya, Daniel (2011). "A distance estimate based on angular expansion for the planetary nebula NGC 6881". Monthly Notices of the Royal Astronomical Society. 414 (4): 3129. arXiv:1103.0231. Bibcode:2011MNRAS.414.3129G. doi:10.1111/j.1365-2966.2011.18609.x. S2CID 118695046.
  • Media related to NGC 6881 at Wikimedia Commons



Allikas: https://en.wikipedia.org/wiki/NGC_6881
No tags for this post.