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Old 18-04-2009, 04:02 PM
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glenc (Glen)
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Join Date: Jun 2005
Location: Terranora
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Planetary nebulae

The attached file now includes 80 globular clusters, 31 planetary nebulae and 135 galaxies. I have include planetary nebulae larger than 12" across down to magnitude 11.0. Sizes for PN are in arc-secs not arc-mins. C STR is the magnitude of the central star. PN in bold are the brightest ones. Six PN are north of dec +45.
Refr: Saguaro Astronomy Club Database version 8.0
Planetary nebula are often typized for their appearance, according to the Vorontsov-Velyaminov scheme:
1 Stellar Image
2 Smooth disk (a, brighter toward center; b, uniform brightness; c, traces of a ring structure)
3 Irregular disk (a, very irregular brightness distribution; b, traces of ring structure)
4 Ring structure
5 Irregular form, similar to a diffuse nebula
6 Anomalous form
http://seds.org/messier/planetar
Attached Files
File Type: zip M like.zip (21.8 KB, 14 views)

Last edited by glenc; 18-04-2009 at 04:55 PM.
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