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Mohan-Mishra 4: Newly Discovered Potential Planetary Nebula Candidate in Cassiopea Constellation.

MoMi-4, "Paras Pathar/Sorcerer's Stone " is a newly discovered potential planetary nebula candidate in Cassiopea Constellation which was found by Indian Amateur Astronomers named Sankalp Mohan & Utkarsh Mishra(Author). The Nebula is designated as MoMi-4, which is the fourth discovery of the team MoMi.Our Potential Planetary Nebula candidate was discovered by examining the Cassiopeia region deeply, MoMi-4 is visible in DSS Blue slightly and was deeply photographed by our good friend Peter Goodhew from the United Kingdom. This nebula Lies near the phantom of the opera nebula and OU2.


Coordinates: 00 29 21.161 +62 43 32.49

Size: 2-3arcmins.

Mohan-Mishra 4 Photographed by Peter Goodhew for 30hrs and Processed by Utkarsh Mishra

Nature of the Object

Currently, we are not clear about the nature of Mohan-Mishra 4 and we leave that part to the Professionals and spectrum that will be obtained. MoMi-4 does not show up in any surveys other than Hydrogen Alpha IPHAS-Dr2, Mohan-Mishra 4 does not have a visible CSPN ( Central Star of Planetary Nebula) but cspn is not always visible in some cases. The region does have some stars eg:007.32005482049 +62.73190909567 There is a dwarf star at a distance of 1745 Pc, 0.95 solar masses / 0.9 solar radii but its too big maybe and seems like an ordinary star, only a small star in a 2' radius no white dwarf. Mohan-Mishra 4 shows up in both Hydrogen-alpha and OIII when captured through narrowband imagery, The object is quite small 3arc min in size this is why we approached Peter Goodhew in Photographying this region as peter owns a dual 6" refractor which is nearly perfect for imaging such small scale objects

MoMi-4 in Hydrogen Alpha : Peter Goodhew

OIII : Peter Goodhew

Image Processing

The approach to processing this new discovery was a bit different than what I generally do in PS and PI, I first did Deconvolution on Luminance and made RGB Master and color calibrated it manually. After I made the LRGB image it was time to Add the Hydrogen Alpha Data to the RGBL, so I used Pixel math to combine the Hydrogen Alpha data. ( You can buy my Image Processing Package to know how I process the astronomical data)

After I combined the Ha in LRGB it was time to combine the OIII but it has extremely fewer details so I had to use Photoshop to enhance and mask the regions for combining it. Technical Information 900sec X52 Subs Hydrogen Alpha Bin 1x1 13hrs 900sec X44 Subs OIII Bin 1x1 11hrs

300sec X16 Luminance Bin 1x1 1hr 20mins 300secX 16 RGB Each Binning 1x1 1hr 20mins each

Peter Goodhew's Dual Imaging rig 6" Refractor

Team MoMi would like to Thank Xavier Strottner, Marcel Drechsler, Peter Goodhew, Dana Patchick, Pascal Le Dû, and Dr. Quentin Andrew Parker for their extraordinary support without them this new find was not possible.

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