Discoveries 26 - 50
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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26
R.A. / Dec. - Constellation
03:45:30 +39°07'40" - Perseus
Suspected nature of object
Dark nebula(e) and/or emission nebula
Description
Two suspected small dark nebulae, approximately 3', aligned southwest to northeast. The southwestern nebula is the larger one, possibly an emission nebula.
Directly northeast of the northeastern nebula is the double star Milburn 16 (WDS03457+3908).
Date, plate or visually
20 November 2014, plate
27
R.A. / Dec. - Constellation
03:47:45 +39°47'00" - Perseus
Suspected nature of object
Dark nebula
Description
A very small, faint patch of nebulosity, 100"×70".
Date, plate or visually
20 November 2014, plate
28
R.A. / Dec. - Constellation
13:49:40 -30°53'00" - Centaurus
Suspected nature of object
Asterism or open cluster
Description
A small, poor and scattered group, moderately detached, 7'×5', approximately 25 stars.
8' West-northwest is the galaxy PGC86310.
Date, plate or visually
11 January 2015, plate
29
R.A. / Dec. - Constellation
18:40:31 -03°54'00" - Scutum
Suspected nature of object
Asterism or open cluster
Description
A small, north-northwest to south-southeast elongated group of stars of mag. 11.3 and fainter, 6'×'2'. On the border of the constellations of Scutum and Serpens (Cauda).
13' Southeast is the open cluster Dolidze 32.
Date, plate or visually
15 January 2015, plate
30
R.A. / Dec. - Constellation
20:04:04 +40°38'50" - Cygnus
Suspected nature of object
Asterism or open cluster
Description
Elongated northeast to southwest, 8'×'6. On the northwestern edge is the mag. 7.7 star SAO49141.
3' North-northeast is a group of stars designated TC 2004+4041. 20' East is the open cluster Cluster Dolidze-Dzimselejsvili 10.
Date, plate or visually
16 January 2015, plate
31
R.A. / Dec. - Constellation
16:28:46 +38°11'00" - Hercules
Suspected nature of object
Asterism or open cluster
Description
A scattered group, 14'. Northeast of the open cluster Dolidze-Dzimselejsvili 5.
Date, plate or visually
16 January 2015, plate
32
R.A. / Dec. - Constellation
08:59:31 +35°35'55" - Lynx
Suspected nature of object
Asterism or open cluster
Description
A scattered, north-south elongated group, 12'×9'.
12' Northeast are the galaxies NGC2719 & NGC2719A, 17' northwest is the double star Couteau 1897 (WDS08585+3548).
Date, plate or visually
13 April 2015, visually
33
R.A. / Dec. - Constellation
07:27:36 -18°29'40" - Puppis
Nature of object
This was determined to be an open cluster in the Catalog of Newly Identified Star Clusters in GAIA DR2, FoF 289.
Description
A small group, 5', surrounding the double star South 550 (WDS07276-1830). On the border of the constellations of Puppis & Canis Major.
Date, plate or visually
1 November 2015, plate
34
R.A. / Dec. - Constellation
12:29:08 -59°49'20" - Crux
Suspected nature of object
Asterism or open cluster
Description
A small group, 2'.
4' West is the open cluster Hogg 14.
Date, plate or visually
15 November 2015, plate
35
R.A. / Dec. - Constellation
02:24:38 +61°33'15" - Cassiopeia
Nature of object
This was determined to be an open cluster, at a distance of approximately 8800 light-years.
Description
A moderately detached group of faint stars, 5.5'×4.5'. Most prominently in POSS2 Red & IR, compared to Blue - old cluster?
7' East is the double star STF257 (WDS02257+6133).
Date, plate or visually
19 November 2015, plate
36
R.A. / Dec. - Constellation
16:14:54 -25°28'37" - Scorpius
Suspected nature of object
Reflection nebula
Description
Surrounding the double star Skiff 1313 (WDS16149-2529) is irregular nebulosity, approximately 3'. The position of this star + suspected nebula is 1.3° west of the nebula Cederblad 130 surrounding the star Sigma Scorpii, itself close to the Antares Nebula and Rho Ophiuchi complex.
Date, plate or visually
1 December 2015, plate
37
R.A. / Dec. - Constellation
19:13:46.5 +27°15'10" - Lyra
Suspected nature of object
Asterism or open cluster
Description
A scattered group, 4'.
4' North-northwest is the carbon star V553 Lyrae
Date, plate or visually
27 August 2017, visually
38
R.A. / Dec. - Constellation
05:02:48 +50°34'00" - Auriga
Suspected nature of object
Asterism or open cluster
Description
A scattered group, 5.5'×4.5'. On the northern edge is the mag. 8.5 star SAO24974.
7' East-northeast is the carbon star EL Aurigae.
Date, plate or visually
14 January 2018, visually
39
R.A. / Dec. - Constellation
05:58:13.2 +28°23'05" - Taurus
Suspected nature of object
Asterism or open cluster
Description
Elongated, 4'×2'.
5' North is the carbon star CGCS1118.
Date, plate or visually
5 February 2018, visually
40
R.A. / Dec. - Constellation
11:09:47 +61°23'30" - Ursa Major
Suspected nature of object
Asterism or open cluster
Description
A scattered group, 10'×8'.
4' West is the galaxy MCG+10-16-069 (PGC33801), 7' east-southeast is NGC3543.
Date, plate or visually
8 February 2018, visually
41
R.A. / Dec. - Constellation
00:16:07 +17°19'00" - Pisces
Suspected nature of object
Asterism or open cluster
Description
A scattered group, elongated north to south, 10'×8'.
8' East is the galaxy NGC57, 13' south-southeast is the double star Greaves 18 (WDS00159+1706)
Date, plate or visually
7 October 2018, visually
42
R.A. / Dec. - Constellation
14:23:41.1 +06°36'11.8" - Virgo
Suspected nature of object
Galaxy? Group of galaxies? Nebula?
Description
A very small and faint, irregular blob, 10"×6".
50" West of the galaxies PGC51413 & PGC51412 that are part of the galaxy group Holmberg 639, with the primary component NGC5599 3' to the southeast.
This object was investigated in April 2019 with the integral-field spectroscopic mode of the IMACS system on one of the Magellan telescopes in Chile. Initial results were inconclusive.
Date, plate or visually
4 December 2018, plate
43
R.A. / Dec. - Constellation
08:18:54 -29°45'00" - Puppis
Suspected nature of object
Reflection nebula
Description
Suspected extremely faint reflection nebula associated with open cluster NGC2571, most prominent to the southwest of cluster in a northwest to southeast elongated patch. Best viewed on POSS2 Blue plate.
Date, plate or visually
10 January 2019, plate
44
R.A. / Dec. - Constellation
11:25:11.4 -09°49'18.2" - Crater
Suspected nature of object
Galaxy? Nebula? Voorwerp?
Description
A very small and faint, irregular, undetermined blob, 17"×9".
3' Southeast of the galaxy NGC3672.
Date, plate or visually
24 January 2019, plate
45
R.A. / Dec. - Constellation
21:26:40 +46°49'00" - Cygnus
Suspected nature of object
Asterism
Description
Horseshoe shaped, 9 stars mag. 8.5 and greater, elongated northwest to southeast, 16'×13'.
Date, plate or visually
25 January 2019, plate
46
R.A. / Dec. - Constellation
03:10:16 +45°53'30" - Perseus
Suspected nature of object
Asterism or open cluster
Description
A small group, 6'×5'. On the north-northeastern edge is the mag. 7.3 star SAO38620.
7' Northwest is the carbon star V409 Persei.
Date, plate or visually
28 January 2019, visually
47
R.A. / Dec. - Constellation
01:23:20.6 +33°20'45" - Pisces
Suspected nature of object
Galaxy or multiple galaxies
Description
Irregular clumps of matter, 0.5'×0.4'.
7' Southeast is the galaxy NGC507 (part of Arp 229), 4' south-southwest is the mag. 7.7 star SAO54647 (mag. 7.7).
This may be previously recognised galaxy, or a radio source.
Date, plate or visually
4 April 2019, plate
48
R.A. / Dec. - Constellation
00:01:27.9 +31°31'22" - Pegasus
Suspected nature of object
Galaxy
Description
Elongated north to south, 0.4'×0.2'.
24" South is the galaxy 2MASS00012763+3130574, 5' south is the galaxy group Arp 112.
Date, plate or visually
5 April 2019, plate
49
R.A. / Dec. - Constellation
11:56:37.1 -19°31'12" - Corvus
Suspected nature of object
Galaxy? Nebula? Voorwerp?
Description
Approximately 0.5'×0.2' in size.
25" East is the mag. 15.2 star 4UCAC353-064078, 4' west-southwest is the galaxy MCG-03-31-002 (PGC37513) in the constellation of Crater.
Date, plate or visually
14 April 2019, plate
50 - A & B
R.A. / Dec. - Constellation
23:42:54 +18°36'58" - Pegasus
A - 23:42:52.2 +18°36'29.2"
B - 23:42:55.7 +18°37'29.6"
Suspected nature of object
Galaxies
Description
2 Irregular galaxies, aligned southwest (A) to northeast (B) and separated by 80".
4' Northeast are the galaxies MCG+03-60-021 & MCG+03-60-022 (PGC72202 & PGC72203, Holmberg 815).
Date, plate or visually
15 April 2019, plate
