https://www.legacysurvey.org//viewer/?ra=109.3749&dec=25.5861&layer=ls-dr9&zoom=16
the green spot only appears in R on 12-16-2018. Nothing in TNS.
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Hi.
These red objects are foreground objects, presumably low-mass stars or distant overlapping galaxies. The green one is only visible on one exposure, and a JPL query shows an asteroid. Sorry!
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Hi, 
The green blob is not a supernova but a mainbelt asteroid. 2007 YE69.
https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2007YE69
Ine 
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