What other star clusters in Puppis have a planetary nebula?

I know that M46 in Puppis has NGC 2438 but Iam convinced that there is another star cluster in Puppis with a planetary nebula.What other star clusters in Puppis have a planetary nebula?I may be way off Base on this, but there is a rather obscure and small open cluster near the eastern border of Puppis where Pyxis and Vela meet.

It's designation is: SAC Cr185 it is in the Saguaro Ac catalog.

The cluster itself is Mag 7.8

Coordinates RA 08:22:30 (Epoch 2000)

DEC -36:10:00

In the center of the cluster is a small nebulosity which has several times been identified by observers as a Planetary. However, it is not named in any catalog as such and has no designation of it's own as far as I can find.

No Mag is given for the Nebulosity.



AdolphWhat other star clusters in Puppis have a planetary nebula?This question is missing an important criterion: how bright must the star cluster and planetary nebula be?



If the answer is "visible in amateur equipment", you could find out by looking at the charts in Uranometria 2000.0 or Millenium Star Atlas.



M46/NGC2438 is really neat in a telescope.



Addendum: How about NGC2579/PK254.6+0.2? Uranometria 2000.0 chart 171.What other star clusters in Puppis have a planetary nebula?Interesting question.



The following link

http://www.skylab.com.au/pmsa/100%20Brig鈥?/a>

lists the 100 brightest planetary nebulae. I used Google Sky to look at the ones in Puppis, and I don't think any others (besides NGC 2438) are in a star cluster.



Of course, there might be a fainter planetary in a star cluster in Puppis.



Incidentally, it is thought that the superposition of NGC 2438 on M46 is a line-of-sight coincidence, and that the planetary nebula is a foreground object. See the following:

http://seds.org/MESSIER/xtra/ngc/n2438.h鈥?/a>



Finally, take a look at the following link:

http://seds.org/messier/xtra/leos/pease1鈥?/a>



It mentions two planetary nebulae that belong to globular clusters:

- Pease 1 in M15

- IRAS 18333-2357 in M22



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There are two other known planetary nebulae in globular clusters. See this link:

http://www.seds.org/messier/xtra/supp/gc鈥?/a>



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laurahal242 -- That's a weird object you mentioned (NGC2579). Here's the entry from the SIMBAD catalog:

http://simbad.u-strasbg.fr/simbad/sim-id鈥?/a>



Here's an image from the POSS2 red survey, 10 arc minutes across:

http://archive.stsci.edu/cgi-bin/dss_sea鈥?/a>



The main object there was formerly classified as a planetary nebula, but is now considered to be an H II region (a region in which the hydrogen has been ionized by hot stars); the classification may still be uncertain. In any case, it would be a nice deep-sky target.



Also, this page

http://www.fortunecity.com/roswell/borle鈥?/a>

associates the nebulosity with open cluster Colllinder 182, whereas the SIMBAD catalog says that the two are unrelated and separated by 15 minutes of arc.



In short, the information is somewhat confusing and conflicting.



There's not much information about Collinder 182, and I'm wondering if it exists. Uranometria shows cluster Collinder 185, which is nearly a third of a degree away.



Here's one more image of the region. This one is 60 minutes of arc across, and takes a bit of time to download (about 6 megabytes):

http://archive.stsci.edu/cgi-bin/dss_sea鈥?/a>



In this photo, Collinder 185 is the very loose open cluster to the lower-left of the photo center, and NGC 2579 is the nebulosity to the upper right. It's not apparent from this photo that NGC 2579 is embedded within a cluster.



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to clarify things a bit: The cluster Cr185 mentioned by Adolph K is the same one that I called Collinder 185. But from the last image linked above, it appears that the nebulosity (NGC 2579) is not in the middle of the cluster, but well away (nearly a third of a degree). Uranometria also shows the two separated by this amount. (Uranometria also shows another cluster coincident with the nebulosity, but that cluster is not apparent on the image.)