Discoveries 51-100
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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1-50 - 101-150 - 151-200 - 201-250 - 251-300 - 301-350 - 351 and further
51
R.A. / Dec. - Constellation
10:53:54.5 -16°06'14.8" - Crater
Suspected nature of object
Galaxy
Description
A small and faint, irregular galaxy.
82" Southeast is the galaxy MCG-03-28-017 (PGC32724), 5' north-northeast is NGC3456.
Date, plate or visually
18 February 2020, plate
52
R.A. / Dec. - Constellation
03:43:00.5 -21°56'50" - Eridanus
Suspected nature of object
Galaxy
Description
A very small and faint (dwarf?) galaxy.
Date, plate or visually
18 February 2020, plate
DECaLS DR8
53
R.A. / Dec. - Constellation
01:51:31.05 +22°45'40.2" - Aries
Suspected nature of object
Galaxy
Description
An irregular galaxy with multiple associated clumps.
Date, plate or visually
18 February 2020, plate
DECaLS DR8
54
R.A. / Dec. - Constellation
13:45:56.32 -12°25'35.5" - Virgo
Suspected nature of object
Reflection nebula
Description
Faint nebulosity surrounding the double star 86 Virginis (STF1780 - WDS13459-1226). Best seen on POSS2 Blue.
Not unlike the nebulosity surrounding the star Psi Virginis (nr. 8), almost 13° to the west-northwest.
2.5' South-southwest is the galaxy IC927, 3' south-southeast is PGC952293, 5' west-southwest is IC924.
Date, plate or visually
7 July 2020, plate
15' POSS2 Blue
15' DESI Legacy DR10
55
R.A. / Dec. - Constellation
06:07:47 +30°06'10" - Auriga
Suspected nature of object
Reflection nebula(e), approximately 75"×60" in size.
Description
A triangle of stars (SAO58771, 4UCAC601-029679 & 4UCAC601-029694) involved in faint nebulosity.
Date, plate or visually
5 September 2020, plate
56
R.A. / Dec. - Constellation
22:29:09 +57°07'20" - Cepheus
Suspected nature of object
Asterism or open cluster, approximately 8'×5' in size.
Description
Visually, a detached group of stars, elongated north-northwest to south-southeast. Contains the orange colored star TYC3991-00696-1.
To the north of the group is the star SAO34507 that is colored orange, too. The group's branching lanes of stars give it a spider-like appearance.
Date, plate or visually
23 September 2020, visually
57
R.A. / Dec. - Constellation
10:03:18.0 +72°09'07.5" - Ursa Major
Suspected nature of object
Galaxy
Description
A small, faint galaxy with a very bright nucleus.
Date, plate or visually
3 December 2020, plate
DECaLS DR8
58
R.A. / Dec. - Constellation
10:04:09 +72°10'17" - Ursa Major
Suspected nature of object
Galaxy
Description
A small, faint galaxy. A small knot is on the west-northwestern edge, a faint star is superimposed over the southeastern edge.
Date, plate or visually
3 December 2020, plate
DECaLS DR8
59
R.A. / Dec. - Constellation
15:42:23.5 +05°09'10" - Serpens (Caput)
Suspected nature of object
Asterism or open cluster
Description
A small, detached, elongated group of approximately 15 stars, approximately 3'×2' in size. The brightest star in the group is 4UCAC476-056890 (mag. 11.8).
Date, plate or visually
7 March 2021, plate
60
R.A. / Dec. - Constellation
08:24:38.6 -77°47'27.5" - Chamaeleon
Suspected nature of object
Galaxy
Description
An extremely small and faint, irregular blob.
85" East-northeast is the mag. 8.3 star SAO256514, 100" west-northwest is the galaxy PGC23573.
Date, plate or visually
22 March 2021, plate
61
R.A. / Dec. - Constellation
04:59:03.6 +37°55'50" - Auriga
Suspected nature of object
Reflection nebula
Description
A very small and faint, elongated glow directly south of the mag. 12 star 4UCAC640-021255. Approximately 2'×1' in size.
3.5' Northwest of the star Omega Aurigae.
Date, plate or visually
7 July 2021, plate
62
R.A. / Dec. - Constellation
20:31:51 +11°03'30" - Delphinus
Suspected nature of object
Reflection nebula
Description
An extremely faint, elongated glow extending east-northeastwards from the mag. 9.9 star TYC1091-00412-1. Approximately 5.0'×2.5' in size.
25' Southwest of the star Epsilon Delphini.
Date, plate or visually
7 July 2021, plate
63
R.A. / Dec. - Constellation
19:25:55.85 +50°02'09.5" - Cygnus
Suspected nature of object
Galaxy
Description
A suspected Magellanic (?) spiral galaxy, approximately 45"×30" in size with a brighter core that is perpendicular to the major axis of the galaxy.
8' Southwest of the galaxy group KPG 539 (IC4867 & MCG+08-35-011).
Date, plate or visually
10 September 2021, plate
64
R.A. / Dec. - Constellation
00:28:43.9 +62°51'01" - Cassiopeia
Suspected nature of object
Reflection nebula or galaxy
Description
Elongated east to west, approximately 1.0'×0.5' in size, surrounding the mag. 12.1 star 4UCAC765-006251 (or the star is superimposed).
Date, plate or visually
16 October 2021, plate
65
R.A. / Dec. - Constellation
00:31:41.5 +62°40'09" - Cassiopeia
Suspected nature of object
Nebula or planetary nebula
Description
An irregular roundish glow, approximately 2.5' in size. In the center is the mag. 14.7 star 4UCAC764-007116, on the northern edge is the mag. 11.9 star TYC4019-02775-1. Directly southwest of the nebula may be a small, dark nebula. 3' Southeast is nr. 156.
On the northeastern edge of the large, irregular and extremely faint emission nebula Sharpless 1-124.
Date, plate or visually
16 October 2021, plate
66
R.A. / Dec. - Constellation
00:32:04.8 +63°51'11" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
Elongated east to west, approximately 2.5'×1.5' in size directly north of the mag. 10.4 star TYC4023-00358-1. Two elongated streaks can be discerned, both running WNW to ESE, the southern one being the brightest.
Date, plate or visually
16 October 2021, plate
67
R.A. / Dec. - Constellation
17:01:04 -04°13'21" - Ophiuchus
Suspected nature of object
Emission and/or reflection nebula
Description
Nebula surrounding the mag. 4.8 star 30 Ophiuchi. Clearest to the south and southwest of the star with a prominent spike towards the west.
Almost 1° of arc due east of the globular cluster Messier 10 (NGC6254).
Date, plate or visually
20 November 2021, plate
68
R.A. / Dec. - Constellation
05:11:26 +38°07'04" - Auriga
Suspected nature of object
Reflection nebula
Description
A small, faint nebula, approximately 60"×35" in size, directly northeast of the mag. 12 star TYC2896-01854-1. 9' Northwest of the emission nebula Sharpless 2-226 and half a degree of arc southwest of the star Mu Aurigae.
On the POSS2 Blue plate, a distinct image artefact is 4' to the northwest.
Date, plate or visually
21 December 2021, plate
69
R.A. / Dec. - Constellation
19:04:24 +25°49'00" - Lyra
Suspected nature of object
Nebula(e) or supernova remnant
Description
Two extremely faint lobes of nebulosity, separated by 12'.
Approximately 12 and 22 minutes of arc, respectively, east of the position of Sharpless 2-85 (which was a suspected plate fault).
The northwestern lobe has a slightly curved shape, is approximately 10'×3' in size and tapers towards the northeast. The southeastern lobe is approximately 3'×1' in size and is oval shaped.
Date, plate or visually
30 December 2021, plate
70
R.A. / Dec. - Constellation
19:49:01.5 +20°09'35" - Vulpecula
Suspected nature of object
Asterism or open cluster
Description
A small group of stars that is not well detached from the surrounding starfield, approximately 3' in size. Brightest star on the northeastern edge is mag. 11.3. The position is 3' northeast of the star that is designated Kohoutek 4-35 (PK 057+02.1).
The results of the Gaia EDR3 analysis by Bruno Alessi were ambiguous; this is more likely to be an asterism than an open cluster.
Date, plate or visually
13 January 2022, plate
71
R.A. / Dec. - Constellation
08:21:26.5 +03°13'00" - Hydra
Suspected nature of object
Asterism or open cluster
Description
A detached group of mag. 12 and fainter stars, 3' north of the galaxy IC2327. Approximately 4'×3' in size. A curved branch of stars is visible directly north-northwest of the group, curving towards the northwest.
Date, plate or visually
25 February 2022, visually
72
R.A. / Dec. - Constellation
21:31:27 +52°37'12" - Cygnus
Suspected nature of object
Reflection nebula
Description
Faint nebulosity surrounding the star SAO33497, component A of the double star Argyle 88 (WDS21315+5237).
Date, plate or visually
5 July 2022, plate
15' DSS POSS2 Blue - 1989
73
R.A. / Dec. - Constellation
21:21:53.5 +52°10'50" - Cygnus
Suspected nature of object
Open cluster
Description
A suspected open cluster involved in the HII region that is listed as No. 6 in the appendix of Kohoutek's 1972 paper 1972A&A….16..291K.
What Kohoutek described as a nebulous nucleus are in fact stars.
Date, plate or visually
6 July 2022, plate
74
R.A. / Dec. - Constellation
17:56:24.7 +18°20'32" - Hercules
Suspected nature of object
Galaxy
Description
A very small and faint galaxy, approximately 2'×1.5' in size. 53 Seconds of arc north of the mag. 7.4 star SAO103327 that is the primary component of the double star STF2245 (WDS17564+1820). Just over 2 minutes of arc to the east-southeast is the galaxy PGC1556550, 5.5 minutes of arc west-northwest is the galaxy pair KPG 526 (NGC6500 & NGC6501).
Date, plate or visually
11 July 2022, plate
75
R.A. / Dec. - Constellation
06:11:52.6 -06°28'36" - Monoceros
Suspected nature of object
Reflection nebula
Description
A relatively bright nebula, surrounding the mag. 9.3 star SAO132945, approximately 1.5'×1.0' in size. 4.5' North of the mag. 5 star SAO132944. South of nr. 107.
Date, plate or visually
13 July 2022, plate
76
R.A. / Dec. - Constellation
06:10:14.6 -06°27'31" - Monoceros
Suspected nature of object
Reflection nebula
Description
Very small and faint, directly north of the mag. 13.3 star 4UCAC418-012700.
Date, plate or visually
13 July 2022, plate
77
R.A. / Dec. - Constellation
06:12:43.7 -06°15'26" - Monoceros
Suspected nature of object
Nebula
Description
An extremely small and very faint, irregular blob.
Date, plate or visually
13 July 2022, plate
78
R.A. / Dec. - Constellation
06:13:37.3 -06°25'02" - Monoceros
Suspected nature of object
Reflection nebula
Description
Extremely small and faint, directly west of the mag. 12.2 star 4UCAC418-013046.
Date, plate or visually
13 July 2022, plate
79
R.A. / Dec. - Constellation
06:14:27.6 -06°21'37" - Monoceros
Suspected nature of object
Reflection nebula
Description
A small wisp to the south-southeast of the mag. 12 star 4UCAC419-012601, best viewed in PanSTARRS.
Date, plate or visually
13 July 2022, plate
80
R.A. / Dec. - Constellation
06:08:41.7 -06°57'44.3" - Monoceros
Suspected nature of object
Emission nebula
Description
Two lobed and extremely faint, east and west of two faint stars aligned north-northwest to south-southeast, brighter surrounding the north-northwestern star. Best viewed in PanSTARRS.
Date, plate or visually
13 July 2022, plate
81
R.A. / Dec. - Constellation
06:08:25.7 -06°57'36" - Monoceros
Suspected nature of object
Emission nebula
Description
An extremely faint, north-south elongated wisp. Best viewed in PanSTARRS. 45" West is a star involved in nebulosity, to the east is a small and faint, detached patch.
Date, plate or visually
13 July 2022, plate
82
R.A. / Dec. - Constellation
06:11:58.7 -05°57'05" - Monoceros
Suspected nature of object
Reflection nebula
Description
South and southeast of the mag. 11.6 star TYC4795-0777-1.
Date, plate or visually
13 July, plate
83
R.A. / Dec. - Constellation
06:59:46.8 -07°38'13" - Monoceros
Suspected nature of object
Reflection nebula
Description
Surrounding the mag. 13.5 star 4UCAC412-022324.
Date, plate or visually
13 July 2022, plate
84
R.A. / Dec. - Constellation
20:19:11 +37°23'45" - Cygnus
Suspected nature of object
Emission and/or reflection nebulae
Description
A group of 3 nebulae aligned southwest to northeast, to the east of the mag. 9.3 A0 star SAO69821.
Date, plate or visually
18 July 2022, plate
85
R.A. / Dec. - Constellation
23:05:16 +60°05'15" - Cepheus
Suspected nature of object
Emission and/or reflection nebula
Description
Approximately 0.3 minutes of arc in size. On the southern edge is the mag. 16 star 4UCAC751-078693. The stars directly south thereof are involved in faint nebulosity, too.
Date, plate or visually
20 July 2022, plate
86
R.A. / Dec. - Constellation
23:05:22.6 +60°05'34" - Cepheus
Suspected nature of object
Emission and or reflection nebula
Description
A very small nebula that involves the mag. 16 star 4UCAC751-078718. The surrounding stars, visible in the PanSTARRS image, may form a small cluster.
Date, plate or visually
20 July 2022, plate
87
R.A. / Dec. - Constellation
00:08:14 +65°40'13" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
Very small and faint, directly north of the mag. 12.5 star 4UCAC779-000269.
Date, plate or visually
22 July 2022, plate
88
R.A. / Dec. - Constellation
06:14:47.2 +12°19'37" - Orion
Suspected nature of object
Emission nebula and open cluster
Description
Surrounding the mag. 15.5 star 4UCAC512-020909 that is
87" north of the mag. 8.6 star SAO95436 and 2' southwest of the emission nebula Sharpless 2-271.
As is evident on the PanSTARRS image (15'), the sprinkling of stars involved in Sharpless 2-271 forms a cluster (Bica, Dutra, Soares 82). A similar, although smaller concentration of stars can be seen surrounding the star 4UCAC512-020909.
Date, plate or visually
24 July 2022, plate
89
R.A. / Dec. - Constellation
03:56:24 +88°30'30" - Ursa Minor
Suspected nature of object
Reflection nebula
Description
An extremely faint, elongated glow close to the mag. 8.7 star SAO552.
The images below, as download from the DSS server and greatly increased in brightness, do not match in orientation.
Date, plate or visually
29 July 2022, plate
15' Blue - 1952
15' Blue - 1997
15' Blue - 1998
15' Red - 1998
90
R.A. / Dec. - Constellation
04:01:41 +68°50'45" - Camelopardalis
Suspected nature of object
Emission and/or reflection nebula
Description
A nebula surrounding the mag. 8 K0 star SAO12986, most prominent to the west of the star. Approximately 1.5' in size.
Date, plate or visually
5 October 2022, plate
15' Blue
15' Red
91
R.A. / Dec. - Constellation
04:20:03 +53°36'45" - Camelopardalis
Suspected nature of object
Emission nebula
Description
A very faint, elongated, irregular nebula. Approximately 3' in size.
On the 1990 POSS2 Red image there is an image artefact 6' west-southwest of the position.
Date, plate or visually
6 October 2022, plate
92
R.A. / Dec. - Constellation
07:17:07.4 +13°49'21" - Gemini
Suspected nature of object
Galaxy
Description
A very small, elongated galaxy. 5' North-northeast of the middle of the open cluster NGC2355.
Date, plate or visually
18 October 2022, plate
93
R.A. / Dec. - Constellation
03:37:40.1 +31°48'37" - Perseus
Suspected nature of object
Galaxy
Description
A very small, elongated galaxy. On the west-southwestern edge of the large and faint emission nebula McDonald 34 that involves the dark nebula Barnard 3.
Date, plate or visually
21 October 2022, plate
94
R.A. / Dec. - Constellation
03:45:47.9 +32°00'59" - Perseus
Suspected nature of object
Reflection nebula
Description
A small nebula surrounding the mag. 9 star SAO56690 / HD281161. The position is approximately 20' southeast of the nebula IC348.
Date, plate or visually
22 October 2022, plate
95
R.A. / Dec. - Constellation
03:42:23.3 +31°57'42.6" - Perseus
Suspected nature of object
Reflection nebula
Description
A small nebula surrounding the mag. 12.2 star 4UCAC610-010399. The position is 7' west-southwest of the reflection nebula Struve-Straka 10.
Date, plate or visually
23 October 2022, plate
96
R.A. / Dec. - Constellation
03:55:35.8 +31°04'29.3" - Perseus
Suspected nature of object
Galaxy
Description
A (Magellanic spiral?) galaxy 3' northeast of the variable and double star X / V397 Persei (component A of the double star Hough 325 - WDS03554+3103). Size is approximately 1.1'×0.8' with a position angle of about 122°.
Date, plate or visually
23 October 2022, plate
15' PanSTARRS
97
R.A. / Dec. - Constellation
02:41:39.7 +42°46'16" - Perseus
Suspected nature of object
Galaxy
Description
A small, faint, elongated galaxy behind the western edge of the open cluster Messier 34 (NGC1039). Approximately 0.8'×0.2' in size. The mag. 10.3 star TYC2853-00829-1 is superimposed over the eastern part of the galaxy. 3' South of nr. 98.
Date, plate or visually
13 november 2022, plate
5' SDSS
98
R.A. / Dec. - Constellation
02:41:42.2 +42°43'14.5" - Perseus
Suspected nature of object
Galaxy
Description
A very small and faint, elongated galaxy behind the southwestern edge of the open cluster Messier 34 (NGC1039). Approximately 0.3'×0.1' in size. 3' South of nr. 97.
Date, plate or visually
13 november 2022, plate
99
R.A. / Dec. - Constellation
16:24:30.4 -27°09'04.2" - Scorpius
Suspected nature of object
Reflection nebula
Description
A relatively large reflection nebula surrounding the mag. 7.3 star SAO184365, approximately 5' in size. The position is 39' south-southeast of the globular cluster Messier 4 (NGC6121) and 1.3° southwest of the star "Antares" (Alpha Scorpii).
Date, plate or visually
14 november 2022, plate
15' PanSTARRS
100
R.A. / Dec. - Constellation
03:52:49.2 +32°15'39" - Perseus
Suspected nature of object
Galaxy
Description
A spiral galaxy, approximately 0.8'×0.6' in size, elongated north to south with a brighter core and prominent arms.
28' Northwest of Zeta Persei. 3' South-southwest is nr. 101.
Date, plate or visually
19 november 2022, plate
15' PanSTARRS
