Discoveries 176 - 200
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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176 - 177 - 178 - 179 - 180 - 181 - 182 - 183 - 184 - 185 - 186 - 187 - 188 - 189 - 190 - 191 - 192 - 193 - 194 - 195 - 196 - 197 - 198 - 199 - 200
1-25 - 26-50 - 51-75 - 76-100 - 101-125 - 126-150 - 151-175 - 201-225 - 226-250 - 251-275 - 276-300 - 301 and further
176
R.A. / Dec. - Constellation
21:55:15.8 +67°25'00.0" - Cepheus
Suspected nature of object
Emission nebula
Description
A northeast-southwest elongated, irregular nebula. 11' East-southeast is nr. 174, 11' northeast is nr. 177.
Date, plate or visually
27 August 2023, plate
10' DSS POSS2 Red
10' DSS POSS1 Red
177
R.A. / Dec. - Constellation
21:56:38 +67°33'15" - Cepheus
Suspected nature of object
Emission nebula
Description
A north-south elongated, filamentary nebula. 11' South-southeast is nr. 174, 11' southwest is nr. 176.
Date, plate or visually
27 August 2023, plate
10' DSS POSS2 Red
10' DSS POSS1 Red
178
R.A. / Dec. - Constellation
21:50:52.8 +68°48'16.3" - Cepheus
Suspected nature of object
Galaxy
Description
A small (spiral) galaxy, approximately 0.3'×0.2' in size.
Date, plate or visually
27 August 2023, plate
5' DSS POSS2 Blue
5' DSS POSS2 Red
179
R.A. / Dec. - Constellation
21:49:06.0 +68°58'31.5" - Cepheus
Suspected nature of object
?
Description
An irregular, undetermined nebulous blob to the east of a faint star. The brightest part of on the eastern side, elongated east to west. A fainter part appears to extend northeastwards from the star.
Date, plate or visually
27 August 2023, plate
5' DSS POSS2 Blue
5' PanSTARRS
5' DSS POSS2 Red
180
R.A. / Dec. - Constellation
22:12:34.5 +70°10'45.0" - Cepheus
Suspected nature of object
Nebula
Description
A detached, northwest-southeast elongated streak, approximately 5' in length, 6' southwest of the reflection nebula Cederblad 201.
Date, plate or visually
29 August 2023, plate
15' DSS POSS2 Blue
15' DSS POSS2 Red
181
R.A. / Dec. - Constellation
22:39:33.6 +71°49'15.0" - Cepheus
Suspected nature of object
Reflection nebula
Description
A small, west-southwest - east-northeast elongated streak north-northwest of the mag. 9.9 star TYC4484-00910-1.
Date, plate or visually
31 August 2023, plate
10' DSS POSS2 Blue
10' DSS POSS2 Red
182
R.A. / Dec. - Constellation
22:55:31.3 +71°34'51.0" - Cepheus
Suspected nature of object
?
Description
A north-northeast - south-southwest elongated, irregular blob.
Date, plate or visually
31 August 2023, plate
10' DSS POSS2 Blue
10' PanSTARRS
10' DSS POSS2 Red
183
R.A. / Dec. - Constellation
22:49:03.6 +73°36'25.0" - Cepheus
Suspected nature of object
Reflection nebula
Description
A small, east to west elongated nebula west of the mag. 9.4 F0 star SAO10509.
Date, plate or visually
31 August 2023, plate
10' DSS POSS2 Blue
10' DSS POSS2 Red
184
R.A. / Dec. - Constellation
16:01:58.7 +84°54'15.0" - Ursa Minor
Suspected nature of object
Galaxy
Description
A Magellanic spiral galaxy
Date, plate or visually
31 August 2023, plate
5' DSS POSS2 Blue
5' PanSTARRS
5' DSS POSS2 Red
185
R.A. / Dec. - Constellation
22:19:02.5 +61°36'22.0" - Cepheus
Suspected nature of object
Nebula
Description
A cometary nebula? Elongated east-southeast to west-northwest, brightest in eastern part.
Date, plate or visually
1 September 2023, plate
5' DSS POSS2 Blue
5' PanSTARRS
5' DSS POSS2 Red
186
R.A. / Dec. - Constellation
22:17:28.5 +61°43'02.0" - Cepheus
Suspected nature of object
Nebula
Description
Circular shape, brightest on western side. On eastern edge of the dark nebula DOBASHI 3296. 3' Southwest is nr. 187.
Date, plate or visually
1 September 2023, plate
10' DSS POSS2 Blue
10' PanSTARRS
10' DSS POSS2 Red
187
R.A. / Dec. - Constellation
22:17:09.6 +61°41'11.6" - Cepheus
Suspected nature of object
Reflection nebula
Description
Surrounding the mag. 14.0 star 4UCAC759-067886. 3' Northwest is nr. 186.
Date, plate or visually
1 September 2023, plate
10' DSS POSS2 Blue
10' PanSTARRS
10' DSS POSS2 Red
188
R.A. / Dec. - Constellation
22:28:51.7 +62°48'55.0" - Cepheus
Suspected nature of object
Nebula
Description
Nebula? Planetary nebula? An extremely faint, irregularly round glow, slightly elongated north to south, approximately 50" in size north to south.
Date, plate or visually
1 September 2023, plate
10' DSS POSS2 Blue
10' PanSTARRS
10' DSS POSS2 Red
189
R.A. / Dec. - Constellation
06:58:26.4 +74°34'05.0" - Camelopardalis
Suspected nature of object
Galaxy
Description
A small, irregular blob, brightest on eastern side in north-northwest to south-southeast elongated part.
Date, plate or visually
2 September 2023, plate
5' DSS POSS2 Blue
5' DSS POSS1 Blue
5' PanSTARRS
190
R.A. / Dec. - Constellation
22:32:32.5 +58°24'56.5" - Cepheus
Suspected nature of object
Emission nebula
Description
A very faint, irregular emission nebula, fanning out towards the northeast, approximately 90"×60" in size. Possibly a brighter part of a larger complex. 4' South-southwest of the emission nebula Sharpless 1-93.
Date, plate or visually
4 September 2023, plate
10' DSS POSS2 Red
10' DSS POSS1 Red
191
R.A. / Dec. - Constellation
22:32:14 +57°54'40" - Cepheus
Suspected nature of object
Emission nebula
Description
A relatively large and bright (emission) nebula, slightly elongated north to south, approximately 90"×60" in size, brightest in southern part.
Date, plate or visually
4 September 2023, plate
10' DSS POSS2 Red
10' DSS POSS2 Blue
192
R.A. / Dec. - Constellation
22:42:22 +60°28'00" - Cepheus
Suspected nature of object
Reflection nebula
Description
A west-southwest to east-northeast elongated streak, east-southeast of the mag. 10.6 star TYC4265-00541-1.
Date, plate or visually
4 September 2023, plate
10' DSS POSS2 Blue
10' PanSTARRS
10' DSS POSS1 Blue
193
R.A. / Dec. - Constellation
22:30:46.5 +61°43'58.0" - Cepheus
Suspected nature of object
Nebula
Description
A small west-southwest - east-northeast elongated streak, south-southeast of the mag. 8.8 K2 star SAO20120.
Date, plate or visually
4 September 2023, plate
10' DSS POSS2 Blue
10' DSS POSS2 Red
194
R.A. / Dec. - Constellation
23:58:51 +60°44'46" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
A small and faint nebula north-northeast of the mag. 9.1 F5 star SAO20972.
Date, plate or visually
7 September 2023, plate
10' DSS POSS2 Blue
10' DSS POSS1 Blue
195
R.A. / Dec. - Constellation
23:42:13 +64°33'37" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
Small and very faint with a curved shape, northwest of the mag. 11.5 star 4UCAC773-061463.
Date, plate or visually
8 September 2023, plate
5' DSS POSS2 Blue
5' DSS POSS1 Blue
196
R.A. / Dec. - Constellation
23:25:51.8 +62°54'22.4" - Cassiopeia
Suspected nature of object
Nebula
Description
A relatively large nebula surrounding the mag. 10.6 star TYC4284-00447-1, most prominent to the east of the star.
Date, plate or visually
8 September 2023, plate
15' DSS POSS2 Red
15' DSS POSS1 Red
197
R.A. / Dec. - Constellation
00:05:00 +58°35'20" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
An extremely faint, east-west elongated band of nebulosity 3.5' north of the mag. 6.5 B3 star SAO21062 (component A of the double star STF3057 - WDS00049-5832).
Date, plate or visually
9 September 2023, plate
15' DSS POSS2 Blue
15' DSS POSS1 Blue
198
R.A. / Dec. - Constellation
08:52:52.6 +72°25'42.0" - Ursa Major
Suspected nature of object
Galaxy
Description
A spiral galaxy, 20" south-southeast of the mag. 10.3 star TYC4378-00170-1.
Date, plate or visually
9 September 2023, plate
10' DSS POSS2 Blue
10' DSS POSS2 Red
199
R.A. / Dec. - Constellation
03:24:03 +75°15'24" - Cassiopeia
Suspected nature of object
Nebula
Description
A relatively large, irregular, rectangularly shape nebula, approximately 3.5' in size.
Date, plate or visually
9 September 2023, plate
15' DSS POSS2 Blue
15' PanSTARRS
15' DSS POSS2 Red
200
R.A. / Dec. - Constellation
23:17:58.4 +61°48'47.4" - Cassiopeia
Suspected nature of object
Reflection nebula
Description
Surrounding the mag. 11.8 star TYC4279-00185-1, on the northeastern edge of the large emission nebula Simeis 100.
Date, plate or visually
12 September 2023, plate
15' DSS POSS2 Blue
15' DSS POSS1 Blue
