Discoveries 301 - 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 and a single galaxy 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 & SDSS (for suspected galaxies), the HASH Planetary Nebulae database and other 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 remove it from my list and update the numbering accordingly.
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301
R.A. / Dec. - Constellation
19:08:14.8 +05°58'39.4" - Aquila
Suspected nature of object
Reflection nebula
Description
Faint nebulosity surrounding the mag. 11.3 star TYC0475-00310-1
Date, plate or visually
10 May 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
302
R.A. / Dec. - Constellation
18:17:30.8 -17°13'05.0" - Sagittarius
Suspected nature of object
Emission nebula
Description
A relatively large and bright, irregular nebula. On the northwestern edge is the mag. 11.8 star 4UCAC364-124985.
Date, plate or visually
10 May 2024, plate
10' POSS2 Red
10' POSS1 Red
10' PanSTARRS
303
R.A. / Dec. - Constellation
18:33:00.5 +03°58'00.0" - Serpens (Cauda)
Suspected nature of object
Reflection nebula
Description
North-south elongated, curving lanes of nebulosity west-northwest of the mag. 7.4 K2 star SAO123625
Date, plate or visually
10 May 2024, plate
10' POSS2 Blue
10' PanSTARRS
304
R.A. / Dec. - Constellation
19:07:43.5 +01°47'05.9" - Aquila
Suspected nature of object
Reflection nebula or planetary nebula
Description
A faint, round nebula, approximately 2.5' in size, with the mag. 8.4 A2 star SAO124300 on the eastern edge.
Date, plate or visually
13 May 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
305
R.A. / Dec. - Constellation
19:02:53.7 +05°20'33.5" - Aquila
Suspected nature of object
Reflection nebula
Description
Irregular nebulosity surrounding the mag. 8.3 A2 star SAO124193.
Date, plate or visually
14 May 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
306
R.A. / Dec. - Constellation
19:16:33.8 +06°34'11.0" - Aquila
Suspected nature of object
Reflection nebula
Description
A small and thin, east-west elongated nebula southwest of the mag. 6.5 A2 star SAO124457. 28" West of the planetary nebula NGC6781, the "Snowglobe Nebula".
Date, plate or visually
14 May 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
307
R.A. / Dec. - Constellation
17:25:59.4 -06°34'53.4" - Ophiuchius
Suspected nature of object
Reflection nebula
Description
A southwest-northeast elongated nebula surrounding the mag. 6.9 B9 star SAO141660.
Date, plate or visually
19 May 2024, plate
15' POSS2 Blue
15' POSS1 Blue
308
R.A. / Dec. - Constellation
17:56:15.0 -04°34'35.3" - Ophiuchius
Suspected nature of object
Reflection nebula
Description
A small and faint, elongated nebula southwest of the mag. 7.3 B9 star SAO141968.
Date, plate or visually
19 May 2024, plate
10' POSS2 Blue
10' POSS1 Blue
309
R.A. / Dec. - Constellation
20:11:55.4 +36°53'57.7" - Cygnus
Suspected nature of object
Nebula
Description
An irregular nebula surrounding the mag. 11.8 star TYC2683-03341-1, approximately 2.5'×1.5' in size.
Date, plate or visually
20 May 2024, plate
10' POSS2 Blue
10' POSS2 Red
10' PanSTARRS
310
R.A. / Dec. - Constellation
20:15:20.3 +55°45'07.3" - Cygnus
Suspected nature of object
Reflection nebula
Description
A northwest-southeast elongated nebula to the northeast of the mag. 9.7 star TYC3941-01537-1, approximately 3' in length.
Date, plate or visually
1 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
311
R.A. / Dec. - Constellation
20:48:48.2 +39°34'51.8" - Cygnus
Suspected nature of object
Reflection nebula
Description
Nebula surrounding the mag. 11.8 star TYC3170-00204-1, approximately 2'×1' in size.
Date, plate or visually
2 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
312
R.A. / Dec. - Constellation
20:34:45 +40°52'40" - Cygnus
Suspected nature of object
Herbig-Haro objects?
Description
3 Small nebulous loops, aligned southwest to northeast. The southwestern and the east-northeastern ones may have been cataloged as "Interstellar Medium Objects"; the central one apparently has not been cataloged.
More objects suspected to be of similar nature are in the emission nebula Simeis 80 to the east-southeast.
Date, plate or visually
10 June 2024, plate
10' POSS2 Red
10' SDSS
10' PanSTARRS
313
R.A. / Dec. - Constellation
06:47:47.9 +74°28'16.5" - Camelopardalis
Suspected nature of object
Galaxy
Description
A small galaxy, 40" south-southeast of the galaxy NGC2258. Incorrectly cataloged as a star (4UCAC823-013359, mag. 15.6).
Observed in the early morning of 4 November 2018, not recognized as a galaxy until 17 June 2024.
Date, plate or visually
4 November 2018, visually
5' POSS2 Blue
5' POSS2 Red
5' PanSTARRS
314
R.A. / Dec. - Constellation
21:43:55.1 +47°48'15.0" - Cygnus
Suspected nature of object
Reflection nebula
Description
A small and faint nebula northwest of the mag. 11.8 star TYC3595-01670-1.
Date, plate or visually
26 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
315
R.A. / Dec. - Constellation
21:28:02 +49°44'50" - Cygnus
Suspected nature of object
Reflection nebula
Description
A small, irregular, T-shaped nebula directly north of the mag. 10.7 star TYC3598-01640-1.
Date, plate or visually
26 June 2024, plate
10' POSS2 Blue
10' POSS1 Blue
10' PanSTARRS
10' SDSS
316
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
317
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
318
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
319
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
320
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
321
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
322
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
323
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
324
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
325
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
326
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
327
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
328
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
329
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
330
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
331
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
332
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
333
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
334
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
335
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
336
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
337
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
338
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
339
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
340
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
341
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
342
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
343
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
344
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
345
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
346
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
347
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
348
R.A. / Dec. - Constellation
05:46:52.5 +25°03'47.0" - Taurus
Suspected nature of object
Nebula
Description
Irregular nebulous wisps, 25" northeast of the galaxy CAP 0543+25.
Date, plate or visually
31 December 2024, plate
10' POSS2 Blue
10' POSS2 Red
10' POSS2 IR
10' PanSTARRS
349
R.A. / Dec. - Constellation
05:37:43.6 +31°50'45.3" - Auriga
Suspected nature of object
Reflection nebula
Description
A faint and irregular, northeast-southwest elongated nebula surrounding the mag. 12.4 star 4UCAC610-022208. Approximately 1.0'×0.5' in size.
8.5' South of the reflection nebula NGC1985 and 13' east of the reflection nebula Van den Bergh 45.
Date, plate or visually
9 February 2025, plate
15' POSS2 Blue
15' POSS1 Blue
350
R.A. / Dec. - Constellation
05:59:55.6 +32°06'44.0" - Auriga
Suspected nature of object
Nebula
Description
A very small and faint nebula southeast of the mag. 11.7 star TYC2410-01712-1.
2' West-northwest of the nebula Gyulbudaghian-Magakian 3-6 and 11' northwest of the nebula Struve-Straka 48.
Date, plate or visually
15 February 2025, plate
10' POSS2 Blue
10' POSS2 Red
10' PanSTARRS
