Jones-emberson 1 (Metsavainio)

Jones-emberson 1

Link: http://www.astroanarchy.blogspot.fi/2013/03/the-jones-emberson-1-project-continues.html

Jones-emberson 1

Link: http://www.astroanarchy.blogspot.fi/2013/03/the-jones-emberson-1-project-continues.html

The Jones-Emberson 1, project continues. I shot five more hours of O-III (light emitted by an ionized Oxygen.) to this planetray nebula. The area of O-III seems to be more extended, than most of the images around are showing.

At previous mail, I wrote about a possible outer halo in this PN. I have not collected enough information to confirm it, even though I shot five more hours with my fast imaging system, Tokina AT-X 300mm f2.8 lens, UHCs-filter and QHY8 camera. It's very much possible, that there is nothing after all but we'll see at end of the next season, spring 2014.

Generally the new O-III data gives a softer look to this extremely dim planetary nebula. The total exposure time is now ~36h, with wide field color data.

There are many background galaxies in this image but they are not showing very well, due to narrowband imaging method. Galaxies and stars are broadband targets and they dim down much, when narrowband filters are used. I'll like to be able to shoot this from a dark location with a LRGB-method.

largish and very dim, planetary nebula.PK 164+31.1, sometimes known as a "Jones-Emberson 1" has an angular diameter of 6', 67" x 6', 67" and it locates in constellation Lynx. Distance from my home town Oulu, Finland, is about 1600 light years.

The tiny Blue central star is a white dwarf, the intense ultraviolet light emitted by this star makes elements in a ring glow. Ionized Hydrogen emits red light and the ionized Oxygen blue one.

Why the name "PK 164+31.1"?

PK comes from the names of Czechoslovakian astronomers Perek and Kouhutec. 1967 they created an extensive catalog of all of the known planetary nebulae in 1964. The number indicates the position in the sky. The alternative name "Jones-Emberson 1" is after its discoveries.

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