Mohan-Mishra 5: Newly Discovered Probable Planetary Nebula in Open star cluster NGC 3293
Updated: Jul 20, 2022
Mohan-Mishra 5: Newly Discovered Potential PN Candidate in Open Star Cluster NGC 3293 Carnia Constellation, found by Indian Amateur Astronomers named Sankalp Mohan &Utkarsh Mishra(Author). The Nebula is designated as MoMi-5, which is the fifth discovery of the team MoMi.Our Potential Planetary Nebula candidate was discovered by examining the Decaps Survey in-depth, It is a very tiny potential candidate which is around 0.2arc minutes in size. The potential Nebula is also visible in the amateur astrophotograph of Jarmo Ruuth PN-G: 285.9+00.0 Coordinates:10:36:37.32 -58:18:05.95 Size:0.2arcmins
The nebulosity might have been involved with that star.
Comparing the Astrobin image and the PanSTARRS plates was
a difficult call. Was it the WD or the red star being responsible?
Fortunately – the low galactic latitude (b = +0.06 degrees) here provides us with the SHS atlas
to use. But the bright region makes it tricky to get the proper result we require.
From the attached images you’ll see I chose the size of the return close-up view from
the short red and Halpha images to be .35’ x .35’ (or 21” x 21”) in extent.
The field is still burned out such that we can’t tell if the nebula that presents itself
is centered or not, so I applied some overall brightening and lowered the contrast to the entire frame.
We can then see that the shell is centered upon the hot WD star!
To prove it further – we made the same treatment on the reddish star’s coordinates and
we find that the shell (maybe 15 to 20” diameter?) is definitely not centered upon that star!
With that strong a concentration of Halpha around the WD’s coordinates (and very little on
the short red exposure)
The Mg. = 17.43 on the cspn. This was the observations done by our expert friend Dana Patchick We thank Pascal De Lu, Marcel,Dana and Xavier for their Support.
