Discoveries 101 - 125
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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1-25 - 26-50 - 51-75 - 76-100 - 126-150 - 151-175 - 176-200 - 201-225 - 226-250 - 251-275 - 276-300 - 301-325 - 326-350 - 351 and further
101
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
102
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
103
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
104
R.A. / Dec. - Constellation
02:41:39.7 +42°46'18" - 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. 105.
Date, plate or visually
13 november 2022, plate
5' SDSS
105
R.A. / Dec. - Constellation
02:41:42.2 +42°43'14.8" - 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. 104.
Date, plate or visually
13 november 2022, plate
106
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
107
R.A. / Dec. - Constellation
03:52:49.2 +32°15'40" - Perseus
Suspected nature of object
Galaxy
Description
A spiral galaxy, approximately 1.0'×0.7' in size, elongated north to south with a brighter core and prominent arms.
28' Northwest of Zeta Persei.
Date, plate or visually
19 november 2022, plate
15' PanSTARRS
108
R.A. / Dec. - Constellation
03:52:54.0 +32°18'46.5" - Perseus
Suspected nature of object
Galaxy?
Description
A small, undetermined blob 3.2' north-northeast of nr. 110.
Date, plate or visually
19 november 2022, plate
5' PanSTARRS
109
R.A. / Dec. - Constellation
04:20:50.7 +45°08'45" - Perseus
Suspected nature of object
Reflection nebula
Description
A very small nebula, approximately 1', surrounding the mag. 12.5 star 4UCAC676-027120. Most prominent directly north of the star, elongated north-northwest to south-southeast.
Date, plate or visually
20 november 2022, plate
110
R.A. / Dec. - Constellation
04:06:14 +50°14'45" - Perseus
Suspected nature of object
Nebula
Description
"Lambda Persei Nebula"
Distinct drapes of nebulosity south of the bright star Lambda Persei, oriented northwest-southeast.
Date, plate or visually
21 november 2022, plate
111
R.A. / Dec. - Constellation
04:01:41.4 +50°29'36" - Perseus
Suspected nature of object
Reflection nebula
Description
A very small nebula, elongated southwest to northeast, surrounding the mag. 10.7 star TYC3335-01171-1.
Date, plate or visually
21 november 2022, plate
112
R.A. / Dec. - Constellation
04:01:36.6 +50°43'40" - Perseus
Suspected nature of object
Reflection nebula
Description
A small nebula surrounding the mag. 8.4 star SAO24352, most prominent to the north of the star.
Date, plate or visually
21 november 2022, plate
113
R.A. / Dec. - Constellation
05:19:28 +58°07'00" - Camelopardalis
Suspected nature of object
Reflection nebula
Description
Drapes of nebulosity surrounding the bright star 15 Camelopardalis.
Date, plate or visually
22 november 2022, plate
114
R.A. / Dec. - Constellation
06:11:49.3 -06°23'02.2" - Monoceros
Suspected nature of object
Reflection nebula
Description
A very small and faint nebula directly north of the mag. 12.4 star TYC4975-00844-1. 5.5' North of nr. 82.
Date, plate or visually
22 november 2022, plate
115
R.A. / Dec. - Constellation
04:41:08 +25°59'34" - Taurus
Suspected nature of object
Reflection nebula
Description
A relatively large nebula surrounding the mag. 8.3 star SAO76704. On the west-southwestern edge of the dark nebula Barnard 220.
Date, plate or visually
4 december 2022, plate
116
R.A. / Dec. - Constellation
04:49:16 +29°34'00" - Taurus
Suspected nature of object
Reflection nebula
Description
Reflection nebula surrounding the variable star V473 Tauri.
Date, plate or visually
20 december 2022, plate
117
R.A. / Dec. - Constellation
04:54:21 +25°16'14" - Taurus
Suspected nature of object
Reflection nebula
Description
A very small reflection nebula surrounding the mag. 10.8 star TYC1836-01463-1, most prominent to the southeast of the star. 8 Minutes of arc east-southeast of nr. 55.
Date, plate or visually
20 december 2022, plate
15' SDSS
118
R.A. / Dec. - Constellation
20:51:25.6 -12°30'05" - Aquarius
Suspected nature of object
Galaxy
Description
A small, irregular or spiral galaxy.
Date, plate or visually
25 december 2022, plate
119
R.A. / Dec. - Constellation
20:52:21.5 -12°19'04" - Aquarius
Suspected nature of object
Galaxy
Description
A small, irregular or spiral galaxy.
Date, plate or visually
25 december 2022, plate
120
R.A. / Dec. - Constellation
20:56:52.4 -11°36'12" - Aquarius
Suspected nature of object
Nebula
Description
An irregular blob, possibly part of a larger complex.
Date, plate or visually
25 December 2022, plate
15' DECaLS
121
R.A. / Dec. - Constellation
05:37:33.2 +22°58'04.5" - Taurus
Suspected nature of object
Nebula
Description
Surrounding the mag. 8.7 M0 star SAO77329, most prominent to the west of the star.
Date, plate or visually
28 December 2022, plate
122
R.A. / Dec. - Constellation
06:36:50 +33°25'30" - Auriga
Suspected nature of object
Emission nebula
Description
A very faint, elongated, relatively large (emission) nebula. Elongated north-northeast to south-southwest, approximately 12'×5' in size. On the southwestern edge is the mag. 7.9 star SAO59285. Possibly part of a larger complex.
Best viewed using DSS2/Red imagery in Aladin.
Date, plate or visually
28 December 2022, plate
123
R.A. / Dec. - Constellation
01:57:14.5 +59°37'20" - Cassiopeia
Suspected nature of object
Nebula
Description
A north to south elongated nebula, approximately 2.0'×0.8' in size. Brightest in the southern part surrounding the mag. 13.3 star 4UCAC749-019488. A larger region is suspected on the Red POSS plate.
8' West of the mag. 6.7 star SAO22793 (component A of the double star Franks 3 - WDS01583+5937).
Date, plate or visually
31 January 2023, plate
124
R.A. / Dec. - Constellation
01:02:18.5 +51°02'05.8" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
East-west running streaks of relatively bright nebulosity, surrounding the mag. 6.6 star SAO21938. Most prominent to the WSW and NNW of the star.
Date, plate or visually
31 January 2023, plate
125
R.A. / Dec. - Constellation
00:51:33.8 +51°34'17.1" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
Streaks of nebulosity running NE-SW, surrounding the mag. 6.2 star SAO21775
Date, plate or visually
31 January 2023, plate
