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.

2023年4月17日 · The breathtaking butterfly-like planetary nebula NGC 6881 is visible here in an image taken by the NASA/ESA Hubble Space Telescope. 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 symmetrical “wings” that spread out about one light-year from one tip to the ...

2012年3月12日 · The breathtaking butterfly-like planetary nebula NGC 6881 is visible here in an image taken by the NASA/ESA Hubble Space Telescope. 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 symmetrical “wings” that spread out about one light-year from one tip to the ...

2007年9月27日 · Here we present a preliminary report of the analysis of new optical (Ha and [NII]) and near-IR (Brg and H2) images and intermediate resolution JHK spectra of this nebula. Our observations confirm the association of the H2 bipolar lobes to NGC 6881 and reveal that H2 is predominantly shock excited in this nebula.

2020年10月27日 · The Raman-scattered He II features have been found in only five PNe so far, and, in particular, it is the first direct detection of an H I component in NGC 6881. The Raman He II λ6545 features in the two PNe are observed to be redshifted with respect to He II λ6560, indicating that the neutral regions are expanding.

NGC 6881 is a Planetary Nebula located in the constellation of Cygnus in the northern hemisphere. NGC 6881 is called NGC 6881 in the New General Catalogue (NGC). This catalogue is a list of deep space objects compiled by John Louis Emil Dreyer in 1888 to update John Herschel's earlier work.

2011年3月1日 · In this paper, we report on high angular resolution radio observations of the planetary nebula NGC 6881 obtained with the Very Large Array at a wavelength of 6 cm. The emission appears to be the superposition of a roundish core and a point-symmetric bipolar structure elongated along a position angle of about 145.

Curtis only hints at the structure and the confusion attendant on NGC 6881, a visually tiny planetary nebula in a crowded region of central Cygnus 3.5 degrees southwest of Sadr (Gamma Cygni).

NGC 6881 is a Planetary Nebula in the Cygnus constellation. NGC 6881 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its visual magnitude of 13.9, NGC 6881 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.

2024年12月4日 · What is NGC 6881? NGC 6881 is an amazing sky wonder called a planetary nebula. It forms when stars like our Sun get old and throw off their outer parts. This leaves a …