Discoveries 201 - 225
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 - 101-125 - 126-150 - 151-175 - 176-200 - 226-250 - 251-275 - 276-300 - 301-325 - 326-350 - 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
