Discoveries 326 - 350
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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326 - 327 - 328 - 329 - 330 - 331 - 332 - 333 - 334 - 335 - 336 - 337 - 338 - 339 - 340 - 341 - 342 - 343 - 344 - 345 - 346 - 347 - 348 - 349 - 350
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 - 351 and further
326
R.A. / Dec. - Constellation
21:07:56 +49°37'45" - Cygnus
Suspected nature of object
Reflection nebula
Description
A small, fan-shaped nebula extending northwestwards from the mag. 9.2 star SAO50484. Not LBN410.
Date, plate or visually
30 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
327
R.A. / Dec. - Constellation
21:48:07 +49°10'30" - Cygnus
Suspected nature of object
Reflection nebula
Description
A small, east-west elongated nebula north-northwest of the mag. 10.3 star TYC3612-01672-1.
Date, plate or visually
30 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
328
R.A. / Dec. - Constellation
21:54:11 +59°44'55" - Cygnus
Suspected nature of object
Reflection nebula
Description
Very faint, irregular, east-west elongated nebulosity involving three stars, mag. 10.9 and greater.
Date, plate or visually
30 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
329
R.A. / Dec. - Constellation
01:50:15.5 +53°41'34.9" - Perseus
Suspected nature of object
Reflection nebula
Description
A small nebula surrounding the mag. 15.2 star 4UCAC719-015428. East-southeast of the middle of the large emission nebula Lynds 640. 3.5' Southwest of the variable star TT Persei (mag. 9.2-10.6).
Date, plate or visually
14 July 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
330
R.A. / Dec. - Constellation
18:19:20.0 -13°54'21.6" - Serpens (Cauda)
Suspected nature of object
Reflection nebula
Description
A small, irregular nebula surrounding the mag. 10.8 star TYC5689-00641-1, southeast of the middle of the large emission nebula Messier 16 (NGC6611) - the "Eagle Nebula".
Date, plate or visually
17 July 2024, plate
10' POSS2 Blue
10' PanSTARRS
331
R.A. / Dec. - Constellation
18:24:01.7 -15°31'39.0" - Scutum
Suspected nature of object
Reflection nebula
Description
A faint nebula surrounding the mag. 12.4 star 4UCAC373-126715.
Date, plate or visually
19 July 2024, plate
10' POSS1 Blue
10' PanSTARRS
332
R.A. / Dec. - Constellation
18:35:22.2 -00°26'34.8" - Serpens (Cauda)
Suspected nature of object
Reflection nebula
Description
A faint nebula surrounding the mag. 12.4 star 4UCAC448-082070. 13' South of the planetary nebula Abell 47.
Date, plate or visually
20 July 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
333
R.A. / Dec. - Constellation
18:34:30.7 -00°29'25.5" - Serpens (Cauda)
Suspected nature of object
Reflection nebula
Description
A faint nebula surrounding the mag. 13.6 star 4UCAC448-082036.
Date, plate or visually
20 July 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
334
R.A. / Dec. - Constellation
18:36:57.5 +00°20'35.7" - Serpens (Cauda)
Suspected nature of object
Reflection nebula
Description
A faint nebula surrounding the mag. 10.8 star TYC0446-00384-1.
Date, plate or visually
20 July 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
335
R.A. / Dec. - Constellation
17:23:11 -53°57'55.0" - Ara
Suspected nature of object
(Planetary) nebula
Description
An extremely faint, southwest-northeast elongated, oval-shaped blob, 3'×2' in size. An annular shape as well as protrusion on the southwestern and northeastern sides are discernible on the DECaPS image.
Date, plate or visually
23 July 2024, plate
15' POSS2 Red
15' DECaPS DR2
336
R.A. / Dec. - Constellation
18:08:35.3 -18°03'30.0" - Sagittarius
Suspected nature of object
Dark nebula
Description
A small, dark (cometary) globule, approximately 1' in size.
13' North-northwest of the emission nebula Sharpless 1-26.
Date, plate or visually
3 September 2024, plate
10' POSS2 Red
10' POSS1 Red
10' PanSTARRS
337
R.A. / Dec. - Constellation
18:00:27.8 -24°18'10.0" - Sagittarius
Suspected nature of object
Reflection nebula
Description
A small reflection nebula surrounding the mag. 11.9 star 4UCAC329-120117.
Date, plate or visually
3 September 2024, plate
10' POSS2 Red
10' PanSTARRS
338
R.A. / Dec. - Constellation
17:57:07.5 -23°56'20.0" - Sagittarius
Suspected nature of object
Nebula
Description
North-northwest - south-southeast elongated, irregular nebulosity to the east, northeast and north of the mag. 6.9 K5 star SAO185981.
Date, plate or visually
3 September 2024, plate
10' POSS2 Red
10' POSS1 Red
10' PanSTARRS
339
R.A. / Dec. - Constellation
18:00:43.5 -22°28'19.8" - Sagittarius
Suspected nature of object
Reflection nebula
Description
Nebulosity surrounding the mag. 11.6 star 4UCAC338-120968. Fainter nebulosity fans out towards the northwest.
Date, plate or visually
3 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
340
R.A. / Dec. - Constellation
18:03:48.9 -23°18'01.8" - Sagittarius
Suspected nature of object
Reflection nebula
Description
A small nebula to the northwest of the mag. 9.0 B5 star SAO186202.
Date, plate or visually
3 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
341
R.A. / Dec. - Constellation
18:12:05.6 -23°13'05.3" - Sagittarius
Suspected nature of object
Reflection nebula
Description
A small and faint nebula surrounding the mag. 1.8 star TYC6843-01412-1.
Date, plate or visually
3 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
342
R.A. / Dec. - Constellation
18:06:54 -21°44'50" - Sagittarius
Suspected nature of object
Reflection nebula
Description
Reflection nebula surrounding the double star Aravamudan 1509 (WDS18069-2144).
Involved in the large emission nebula Courtès 17.
Date, plate or visually
3 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
343
R.A. / Dec. - Constellation
18:07:08.4 -21°51'27.1" - Sagittarius
Suspected nature of object
Reflection nebula
Description
Reflection nebula surrouding the mag. 12.0 star TYC6263-01399-1.
Involved in the large emission nebula Courtès 17.
Date, plate or visually
3 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
344
R.A. / Dec. - Constellation
18:07:15.7 -21°14'37.9" - Sagittarius
Suspected nature of object
Reflection nebula
Description
A small and faint nebula north of the mag. 11.3 star TYC6263-01904-1.
Date, plate or visually
3 September 2024, plate
10' POSS2 Blue
10' PanSTARRS
345
R.A. / Dec. - Constellation
18:18:02.9 -16°52'24.9" - Sagittarius
Suspected nature of object
Reflection nebula
Description
Surrounding the mag. 12.6 star 4UCAC366-123534. A smaller (emission) nebula is to the east-northeast.
On the POSS1 Blue image a prominent image artefact is south of the nebula.
Date, plate or visually
4 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
346
R.A. / Dec. - Constellation
18:18:16.2 -16°50'38.7" - Sagittarius
Suspected nature of object
Nebula
Description
West of the mag. 14.0 star 4UCAC366-123575.
Date, plate or visually
4 September 2024, plate
10' POSS2 Red
10' POSS1 Red
10' POSS1 Blue
10' PanSTARRS
347
R.A. / Dec. - Constellation
18:18:25.8 -16°50'40.0" - Sagittarius
Suspected nature of object
Emission nebula
Description
A small, irregular nebula.
Date, plate or visually
4 September 2024, plate
10' POSS2 Red
10' PanSTARRS
348
R.A. / Dec. - Constellation
18:18:06 -16°49'21" - Sagittarius
Suspected nature of object
Reflection nebula
Description
An extremely faint nebula. Best viewed on PanSTARRS imagery.
Date, plate or visually
4 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
349
R.A. / Dec. - Constellation
18:16:18.6 -16°53'53.6" - Sagittarius
Suspected nature of object
Reflection nebula
Description
Surrounding the mag. 12 star 4UCAC366-122817.
Date, plate or visually
4 September 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
350
R.A. / Dec. - Constellation
18:02:00.7 -25°35'05.9" - Sagittarius
Suspected nature of object
Reflection nebula
Description
A small and very faint, irregular nebula surrounding the mag. 12.7 star 4UCAC323-128838. Most prominent southeast of the star.
Date, plate or visually
4 September 2024, plate
10' POSS2 Blue
10' PanSTARRS
