...or to give it it's proper title, PK 104-29.1 . This planetary nebula was not picked up during the first great sky survey of about 10,000 deep sky objects for the New General Catalogue and the Index Catalogues. It is about 12.7 visual /15.1 photographic magnitude and its blue glow is spread over the two main arcs of a twisted ring over 5' in diameter. I saw the glow from one arc in the 20", but using a Lumicon UHC filter I could see both arcs and make out the ring - it was faint but easy after 10 minutes dark adaption - both of us present saw it visually this way. The central star is very blue and magnitude 15.7 easily captured in this image comprising of 9 x 30 second exposures (without detrailing). It is easily located (but not seen!) by going 1ºSSE of 72 Peg which is just north of the Square of Pegasus.
Sunday, 28 December 2008
Jones 1
...or to give it it's proper title, PK 104-29.1 . This planetary nebula was not picked up during the first great sky survey of about 10,000 deep sky objects for the New General Catalogue and the Index Catalogues. It is about 12.7 visual /15.1 photographic magnitude and its blue glow is spread over the two main arcs of a twisted ring over 5' in diameter. I saw the glow from one arc in the 20", but using a Lumicon UHC filter I could see both arcs and make out the ring - it was faint but easy after 10 minutes dark adaption - both of us present saw it visually this way. The central star is very blue and magnitude 15.7 easily captured in this image comprising of 9 x 30 second exposures (without detrailing). It is easily located (but not seen!) by going 1ºSSE of 72 Peg which is just north of the Square of Pegasus.
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