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.
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351 - 352 - 353 - 354 - 355 - 356 - 357 - 358
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358
R.A. / Dec. - Constellation
22:10:41 +55°33'45" - Cepheus
Suspected nature of object
Nebula
Description
A faint, irregular, wasp-tailed nebula, elongated northwest to southeast. 7' Northwest of the planetary nebula PN G101.5-00.6 and 10' north of the open cluster NGC7226.
Date, plate or visually
9 November 2024, plate
15' POSS2 Blue
15' POSS2 Red
15' PanSTARRS
357
R.A. / Dec. - Constellation
04:52:31 +07°42'00" - Orion
Suspected nature of object
?
Description
A group of nebulous wisps, approximately 15' in size.
Date, plate or visually
25 October 2024, plate
30' POSS2 Red
30' DESI Legacy DR10
356
R.A. / Dec. - Constellation
01:34:32.2 -50°34'18.0" - Phoenix
Suspected nature of object
?
Description
Blue clumps and wisps (on DESI Legacy imagery), elongated north-northeast to south-southwest, west of the galaxy PGC465139 and east of the larger galaxy PGC465179.
Possibly a Voorwerp or a Blue blob.
Date, plate or visually
23 October 2024, plate
5' DESI Legacy DR10
5' GALEX
5' POSS2 IR
5' POSS2 Red
5' POSS2 Blue
355
R.A. / Dec. - Constellation
16:11:21.5 -48°30'45.0" - Norma
Suspected nature of object
Emission nebula
Description
A relatively bright, half-circle nebula, approximately 4.0'×2.5' in size. 32' North-northeast of the emission nebula Stromlo 51.
Date, plate or visually
5 October 2024, plate
15' POSS2 Red
15' DECaPS DR2
354
R.A. / Dec. - Constellation
16:10:57.8 -48°32'42.3" - Norma
Suspected nature of object
Emission nebula
Description
Surrounding the mag. 13.6 star 4UCAC208-117980. 29' North-northeast of the emission nebula Stromlo 51.
Date, plate or visually
5 October 2024, plate
10' POSS2 Red
10' DECaPS DR2
353
R.A. / Dec. - Constellation
16:10:11 -48°31'30" - Norma
Suspected nature of object
Emission nebula
Description
A very faint, irregular, north-south elongated nebula, approximately 4.5'×2.0' in size. 30' North of the emission nebula Stromlo 51.
Date, plate or visually
5 October 2024, plate
15' POSS2 Red
15' DECaPS DR2
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
