Discoveries 351 and further
Suspected deep sky objects that are, to the best of my knowledge, unknown and undesignated. Most of these were stumbled upon on DSS images while compiling CSOG observing guides. A few asterisms, possibly open clusters were seen during observing runs.
Before posting, I check multiple images (DSS, SDSS, DECaLS) to rule out artefacts. Once an object is determined to be real I check SIMBAD, NED, HyperLeda (for suspected galaxies), possible planetary nebulae, historical catalogs (for nebulae) and every available catalog in AstroPlanner.
The majority of these objects were reported on the Deep Sky Hunters group.
Whenever it is brought to my attention that an object that I suspected to be unknown / uncataloged / undesignated was indeed recognized before, I will remove it from my list and update the numbering accordingly.
Jump to...
1-25 - 26-50 - 51-75 - 76-100 - 101-125 - 126-150 - 151-175 - 176-200 - 201-225 - 226-250 - 251-275 - 276-300 - 301-325 - 326-350
352
R.A. / Dec. - Constellation
18:17:38.3 -19°47'30" - Sagittarius
Suspected nature of object
Reflection nebula
Description
7' South of the middle of the nebula IC1284, surrounding the stars TYC6273-00517-1 (south-southeast, mag. 11.2) and TYC6273-00439-1 (north-northwest, mag. 12.3), aligned south-southeast to north-northeast and separated by 34".
Date, plate or visually
11 September 2024, plate
10' POSS1 Blue
10' PanSTARRS
351
R.A. / Dec. - Constellation
18:17:00 -18°42'00" - Sagittarius
Suspected nature of object
Emission nebula
Description
A small and very faint, possibly two-lobed nebula on the western edge of the open cluster Turner 4 and 3' south-southeast of the nebula Sharpless 1-37. 12' South of the middle of the star cloud Messier 24 (IC4715, the "Sagittarius Star Cloud").
Date, plate or visually
6 September 2024, plate
10' POSS2 Red
10' POSS1 Red
