Clear Skies

visual astronomy

201-250

Discoveries 201 - 250

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 (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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201 - 202 - 203 - 204 - 205 - 206 - 207 - 208 - 209 - 210 - 211 - 212 - 213 - 214 - 215 - 216 - 217 - 218 - 219 - 220 - 221 - 222 - 223 - 224 - 225 - 226 - 227 - 228 - 229 - 230 - 231 - 232 - 233 - 234 - 235 - 236 - 237 - 238 - 239 - 240 - 241 - 242 - 243 - 244 - 245 - 246 - 247 - 248 - 249 - 250

1-50 - 51-100 - 101-150 - 151-200 - 251-300 - 301-350 - 351 and further

201

R.A. / Dec. - Constellation

04:12:55.7 +54°24'45.0" - Camelopardalis

Suspected nature of object

Reflection nebula

Description

A relatively bright, north-northeast to south-southwest elongated streak, east of the mag. 7.8 F0 star SAO24468. Approximately one arcminute in length.

Date, plate or visually

23 September 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

10' SDSS

10' PanSTARRS

202

R.A. / Dec. - Constellation

03:58:38.2 +53°59'19.3" - Camelopardalis

Suspected nature of object

Reflection nebula

Description

Streaks of nebulosity, orientated east-west, surrounding the A7 variable star DD Camelopardalis (mag. 6.9-7.1).

Date, plate or visually

23 September 2023, plate

15' DSS POSS2 Blue

15' DSS POSS1 Blue

203

R.A. / Dec. - Constellation

01:53:51.0 +67°44'49.6" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

Southeast of the mag. 9.4 B8 star HIP8851, fanning out towards the southeast. The brightest part is approximately 2.5 arcminutes in size. The nebula may be larger, extending farther towards the east and towards the northwest of the star.

Date, plate or visually

29 September 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

204

R.A. / Dec. - Constellation

02:36:34.5 +60°32'19.2" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small, round reflection nebula surrounding the mag. 14.9 star 4UCAC753-026114. In the IRAS 02327+6019 Cluster, surrounded by the dark nebula DOBASHI 3900.
On the southeastern edge of the "Heart Nebula".

Date, plate or visually

30 September 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

205

R.A. / Dec. - Constellation

02:42:57.3 +55°50'45.2" - Perseus

Suspected nature of object

Reflection nebula

Description

A relativey large and bright, irregular nebula surrounding the mag. 10.5 star TYC3704-00205-1.

Date, plate or visually

30 September 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

206

R.A. / Dec. - Constellation

02:37:16.8 +41°58'55.0" - Andromeda

Suspected nature of object

Galaxy

Description

A relatively large and bright, irregular galaxy, elongated north to south, approximately 1.4'×0.6' in size.

Date, plate or visually

30 September 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

10' PanSTARRS

207

R.A. / Dec. - Constellation

03:21:19.0 +61°59'53.6" - Camelopardalis

Suspected nature of object

Reflection nebula

Description

Faint, east-west elongated streaks to the north of the mag. 6.8 B8 star SAO12716.

Date, plate or visually

1 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS1 Blue

208

R.A. / Dec. - Constellation

02:47:48.8 +61°55'35.0" - Cassiopeia

Suspected nature of object

Emission nebula

Description

Small, round and extremely faint. The fourth, southeastern nebula in a more or less square group with Simeis 116 (to the west), Sharpless 1-141 (northwest) and Sharpless 1-142 (north-northwest).

Date, plate or visually

2 October 2023, plate

10' DSS POSS2 Red

10' DSS POSS1 Red

209

R.A. / Dec. - Constellation

03:20:14.9 +60°17'01.6" - Camelopardalis

Suspected nature of object

Reflection nebula

Description

Reflection nebula surrounding the mag. 12.4 star 4UCAC752-029300.

Date, plate or visually

2 October 2023, plate

5' DSS POSS2 Blue

5' DSS POSS1 Blue

210

R.A. / Dec. - Constellation

03:18:58.8 +60°22'30.0" - Camelopardalis

Suspected nature of object

Reflection nebulae

Description

A double reflection nebula surrounding the stars 4UCAC752-029182 (south, mag. 15.8) & 4UCAC752-029181 (north, mag. 15.9).

Date, plate or visually

2 October 2023, plate

5' DSS POSS2 Blue

5' DSS POSS1 Blue

211

R.A. / Dec. - Constellation

04:44:04 +62°26'45" - Camelopardalis

Suspected nature of object

Reflection nebula

Description

An extremely faint, NW-SE elongated nebula south of the mag. 10.7 star TYC4082-00369-1.

Date, plate or visually

2 October 2023, plate

10' DSS POSS2 Blue - 1996

10' DSS POSS2 Blue - 1993

212

R.A. / Dec. - Constellation

03:00:52.2 +52°21'06.2" - Perseus

Suspected nature of object

Reflection nebula

Description

Drapes of nebulosity east of the double star STF331 (mag. 5.3 B7 & mag. 6.2 B9).

Date, plate or visually

4 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS1 Blue

213

R.A. / Dec. - Constellation

18:10:00.5 +68°49'24.6" - Draco

Suspected nature of object

Galaxy?

Description

A suspected galaxy directly northwest of the mag. 8.4 M0 star SAO17799 - a nearby supernova was recorded on 27 June 2023.

Date, plate or visually

4 October 2023, plate

5' DSS POSS2 Blue

5' DSS POSS2 Red

5' DECaLS

214

R.A. / Dec. - Constellation

03:02:12.7 +41°35'55.0" - Perseus

Suspected nature of object

Part of galaxy?

Description

A nebulous loop, almost 180°, east to north of S0 galaxy MCG+07-07-017 (PGC11449).

Date, plate or visually

4 October 2023, plate

5' DSS POSS2 Blue

5' DSS POSS2 Red

5' SDSS

5' PanSTARRS

215

R.A. / Dec. - Constellation

02:52:53 +20°13'00" - Aries

Suspected nature of object

Dark nebula

Description

A north-northwest - south-southeast elongated dark nebula, shaped like a wrench, 20' long.

Date, plate or visually

4 October 2023, plate

30' DSS POSS2 Blue

30' DSS POSS2 Red

30' SDSS

30' PanSTARRS

216

R.A. / Dec. - Constellation

03:21:06 +48°49'40" - Perseus

Suspected nature of object

Reflection nebula

Description

Relatively large, northwest-southeast elongated streaks west of the mag. 8.0 A0 star SAO38745. Approximately 7' in length.

Date, plate or visually

4 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS1 Blue

217

R.A. / Dec. - Constellation

03:20:10.6 +46°12'00.0" - Perseus

Suspected nature of object

Dark nebula

Description

A small dark nebula, elongated north to south, approximately 3.5' in length.

Date, plate or visually

4 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS2 Red

15' PanSTARRS

218

R.A. / Dec. - Constellation

03:20:21 +41°53'58" - Perseus

Suspected nature of object

Galaxy?

Description

A small, irregular galaxy ENE of the mag. 8.2 A2 star SAO38738.

Date, plate or visually

4 October 2023, plate

5' DSS POSS2 Blue

5' DSS POSS2 Red

5' SDSS

219

R.A. / Dec. - Constellation

02:32:22.3 +40°16'20.9" - Andromeda

Suspected nature of object

Nebula?

Description

A small nebulous spike protruding northwards from the mag. 6.7 A0 star SAO38099.

Date, plate or visually

4 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

220

R.A. / Dec. - Constellation

00:34:17.4 +58°56'05.6" - Cassiopeia

Suspected nature of object

Nebula

Description

An irregular nebula surrounding the mag. 12.4 star 4UCAC745-004459.

Date, plate or visually

4 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

10' PanSTARRS

221

R.A. / Dec. - Constellation

18:05:32.4 -01°57'56.0" - Serpens (Cauda)

Suspected nature of object

Reflection nebula

Description

Southwest-northeast elongated streaks of nebulosity south of the mag. 8.5 K0 star SAO142075.

Date, plate or visually

5 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

10' PanSTARRS

222

R.A. / Dec. - Constellation

00:12:43.5 +65°32'42.8" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small nebula surrounding the mag. 10.8 star HIP1021. 83" East-southeast of Parsamian-Petrosyan 4, yet this little nebula seems to have remained uncataloged. 6' Northeast is the reflection nebula Cederblad 1, 16' north-northeast is nr. 229.

Date, plate or visually

5 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

223

R.A. / Dec. - Constellation

20:24:35 +65°39'00" - Draco

Suspected nature of object

Dark nebula

Description

A southwest-northeast elongated, two lobed dark nebula, approximately 4.5 arcminutes in length. Fainter extensions towards the southwest.

Date, plate or visually

6 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS2 Red

15' PanSTARRS

224

R.A. / Dec. - Constellation

04:55:03.1 +55°15'32.9" - Camelopardalis

Suspected nature of object

Reflection nebula

Description

East-west elongated streaks south and southeast of the mag. 5.5 B9.5 (double) star 5 Camelopardalis. Approximately 12' in length.

Date, plate or visually

6 October 2023, plate

30' DSS POSS2 Blue

30' DSS POSS1 Blue

225

R.A. / Dec. - Constellation

23:20:06 +23°53'30" - Pegasus

Suspected nature of object

Nebula

Description

An L-shaped nebulous feature, approximately 6'×3' in size.

Date, plate or visually

6 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS2 Red

226

R.A. / Dec. - Constellation

01:04:26.9 +66°14'23.7" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small nebula surrounding the mag. 12.9 star 4UCAC002561, on the northern edge of the dark nebula DOBASHI 3757.

Date, plate or visually

10 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

227

R.A. / Dec. - Constellation

00:42:40.8 +68°09'50.4" - Cassiopeia

Suspected nature of object

Nebula

Description

A small, southeast-northwest elongated nebula north of the mag. 7.9 K0 star SAO11341.

Date, plate or visually

10 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

228

R.A. / Dec. - Constellation

23:31:31.1 +69°25'04.5" - Cepheus

Suspected nature of object

Nebula

Description

A very small, nebulous spike protruding northeastwards from the mag. 9.7 F5 star HIP116104.

Date, plate or visually

10 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

229 - "Ton's Nebula"

R.A. / Dec. - Constellation

00:01:57.7 +63°39'05.1" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

"Ton's Nebula"
A small, east-west elongated nebula surrounding the mag. 13.3 star 4UCAC769-000419.
Discovered 11 years to the day after my beloved father Ton van Wulfen traded earth for eternity. Ton II, III & IV were discovered on this same day.

Date, plate or visually

11 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

10' PanSTARRS

230 - Ton II

R.A. / Dec. - Constellation

23:50:28.5 +63°56'58.0" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

"Ton II"
A small nebula surrounding the mag. 12.9 star 4UCAC770-065904, most prominent to the south of the star.
Discovered 11 years to the day after my beloved father Ton van Wulfen traded earth for eternity. Ton I - "Ton's Nebula", Ton, III & IV were discovered on this same day.

Date, plate or visually

11 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

10' PanSTARRS

231 - Ton III

R.A. / Dec. - Constellation

00:05:45.2 +55°41'48.8" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

"Ton III"
A nebulous spike, orientated north-northwest to south-southeast, with a fainter curved section southwest thereof. Shaped like the Greek letter Lambda. Southeast of the mag. 7.1 K0 star SAO21076.
Discovered 11 years to the day after my beloved father Ton van Wulfen traded earth for eternity. Ton I - "Ton's Nebula", Ton II & IV were discovered on this same day.

Date, plate or visually

11 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

10' PanSTARRS

232 - Ton IV

R.A. / Dec. - Constellation

00:11:46.3 +56°38'55.3" - Cassiopeia

Suspected nature of object

Nebula

Description

"Ton IV"
A small nebula surrounding the mag. 10.6 star TYC3660-00726-1.
Discovered 11 years to the day after my beloved father Ton van Wulfen traded earth for eternity. Ton I - "Ton's Nebula", Ton II & III were discovered on this same day.

Date, plate or visually

11 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

233

R.A. / Dec. - Constellation

00:32:16.6 +65°36'08.2" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small and faint, east-west elongated nebula northeast of the mag. 10.6 star TYC4023-00215-1. On the southern edge of a dark nebula.

Date, plate or visually

12 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

234

R.A. / Dec. - Constellation

00:40:31.6 +66°53'37.2" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small, irregular nebula involving 4 faint stars.
7' East-northeast of nr. 235.

Date, plate or visually

12 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

10' PanSTARRS

235

R.A. / Dec. - Constellation

00:39:21.6 +66°51'46.6" - Cassiopeia

Suspected nature of object

Emission nebula

Description

A faint nebula surrounding the mag. 13.2 star 4UCAC785-001518.
7' West-southwest of nr. 234.

Date, plate or visually

12 October 2023, plate

10' DSS POSS2 Red

10' DSS POSS1 Red

236

R.A. / Dec. - Constellation

00:51:33.4 +65°47'58.7" - Cassiopeia

Suspected nature of object

Nebula

Description

A small, irregular nebula surrounding the mag. 15.8 star 4UCAC779-002131. May involve a faint star cluster. Approximately 7' west of the middle of the large and faint emission nebula Sharpless 2-183.

Date, plate or visually

12 October 2023, plate

5' DSS POSS2 Blue

5' DSS POSS2 Red

5' PanSTARRS

237

R.A. / Dec. - Constellation

00:50:43.6 +64°14'51.2" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

East-west elongated streaks of nebulosity north of the mag. 5.5 G5 star SAO11424.

Date, plate or visually

12 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

238

R.A. / Dec. - Constellation

00:29:52.8 +57°41'22.5" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small, curved nebula northwest of the mag. 10.9 star TYC3662-02233-1.

Date, plate or visually

12 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

239

R.A. / Dec. - Constellation

01:30:07.5 +64°25'20.9" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

West-northwest - east-southeast elongated nebulosity surrounding the mag. 8.4 B2 star SAO11780. Approximately 4' in length.

Date, plate or visually

13 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS1 Blue

240

R.A. / Dec. - Constellation

01:37:44.4 +65°03'21.2" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small nebula south of the mag. 12.6 star TYC4039-00719-1.

Date, plate or visually

13 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

241

R.A. / Dec. - Constellation

01:04:11.8 +62°06'05.1" - Cassiopeia

Suspected nature of object

Nebula

Description

A small, north-northeast to south-southwest elongated nebula east of the mag. 13.5 star 4UCAC761-009805.

Date, plate or visually

13 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

242

R.A. / Dec. - Constellation

01:26:16.2 +62°04'45.8" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

Faint nebulosity east-northeast of the mag. 10.4 star TYC4035-02292-1.

Date, plate or visually

13 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

243

R.A. / Dec. - Constellation

00:44:04 +56°07'35" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A two-lobed nebula involving three mag. 11.4 and fainter stars, approximately 2.5' in size. Involved in larger, fainter nebulosity. 14' North of nr. 245.

Date, plate or visually

14 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

244

R.A. / Dec. - Constellation

00:44:13.3 +55°52'56.8" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small nebula surrounding the mag. 11.9 star 4UCAC730-007336. 8' Northwest of the reflection nebula Neckel-Staude 2, 6' north-northwest of nr. 246 and 14' south of nr. 244.

Date, plate or visually

14 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

245

R.A. / Dec. - Constellation

00:44:21.4 +55°46'42.6" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small east-west elongated nebula surrounding the stars 4UCAC729-007111 (mag. 14.2) and 4UCAC729-007112 (mag. 13.7). 5' West of the reflection nebula Neckel-Staude 2 and 6' south-southeast of nr. 245.

Date, plate or visually

14 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

246

R.A. / Dec. - Constellation

00:58:50.8 +56°18'34.7" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small nebula surrounding the mag. 12.6 star 4UCAC732-009331. 13' South-southeast of the group of 4 nebulae that form Dorschner-Gürtler 6.

Date, plate or visually

14 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

247

R.A. / Dec. - Constellation

01:11:21.8 +57°32'15.0" - Cassiopeia

Suspected nature of object

Emission & reflection nebula

Description

A large and relatively bright nebula involving several stars mag. 9.3 and fainter, that form a cluster designated SFR 125.61-5.21. Approximately 10'×7' in size, brightest in the northeastern part. North of the middle is a small reflection nebula surrounding the mag. 12.7 star TYC3677-00890-1 with a notable, semicircular feature directly northeast thereof.

Date, plate or visually

14 October 2023, plate

15' DSS POSS2 Blue

15' DSS POSS2 Red

248

R.A. / Dec. - Constellation

00:49:19.3 +62°29'10.6" - Cassiopeia

Suspected nature of object

Reflection nebula

Description

A small, irregular nebula surrounding the mag. 12.4 star TYC4020-01468-1.

Date, plate or visually

15 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS1 Blue

249

R.A. / Dec. - Constellation

01:25:11.1 +54°22'42.0" - Cassiopeia

Suspected nature of object

Galaxy

Description

A small, irregular / peculiar galaxy, approximately 0.8'×0.6' in size. Southeast of the mag. 9.0 A0 star SAO22261.

Date, plate or visually

15 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red

250

R.A. / Dec. - Constellation

01:17:22.1 +63°58'18.4" - Cassiopeia

Suspected nature of object

Nebula, planetary nebula?

Description

An irregular nebula surrounding the mag. 10.8 star TYC4038-00404-1.

Date, plate or visually

18 October 2023, plate

10' DSS POSS2 Blue

10' DSS POSS2 Red