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Last update: 2017-09-24

VdS FG

- Open Clusters & Asterisms (Mon) -

And (3) Cep (23) Cyg (23) Lyr (2) Sct (4) Vir (1)
Aql (7) CMa (3) Del (1) Mon (7) Ser (2) Vul (8)
Aqr (1) CMi (1) Dra (1) Oph (3) Sge (1)
Aur (6) Cnc (3) Gem (8) Ori (11) Sgr (5)
Cam (4) Com (1) Her (3) Peg (1) Tau (6)
Cap (1) Crv (1) Hya (1) Per (13) Tri (1)
Cas (21) CVn (1) Lac (6) Pup (6) UMi (1)

Berkeley 37 (OC)

DSS
© DSS II (red) - 8×8'
Name: Berkeley 37
Type: OC
Constellation: Mon
Coordinates: 07h20m18.70s / -00°59'38.00"
Brightness / Size: - / 4.0x4.0'
8" f/6, 150x, Bortle 4, SQM-L 21.0
SQM-L 20.2: East of a 9.5 mag star the cluster is only visible with averted vision. The cluster appeared round with many faint, rather evenly distributed members.
MODERATE

M50 (OC)

DSS
© DSS II (red) - 25×25'
Name: M50, NGC2323
Type: OC
Constellation: Mon
Coordinates: 07h02m47.50s / -08°20'16.00"
Brightness / Size: v5.9 mag / 16.0x16.0'
8" f/6, 80x, Bortle 5+
Fairly obvious, well concentrated toward the middle compared to the surrounding. At the edges some moderately bright stars, whereas the center contains more fainter stars. At 37x the background appeared slightly diffuse. On the southern edge a brighter, orange colored star.
EASY

NGC2215 (OC)

DSS
© DSS II (red) - 20×20'
Name: NGC2215, H7.20
Type: OC
Constellation: Mon
Coordinates: 06h20m49.00s / -07°17'00.00"
Brightness / Size: v8.4 mag / 11.0x11.0'
B 40mm, 8x, Bortle 4, SQM-L 21.0
SQM-L 20.7: Moderately large, rather evenly bright. Not resolved.
MODERATE

NGC2244 (OC)

DSS
© DSS II (blue) - 35×35'
Name: NGC2244, H7.2
Group: Rosettennebel
Type: OC
Constellation: Mon
Coordinates: 06h31m55.00s / +04°56'30.00"
Brightness / Size: v4.8 mag / 24.0x24.0'
Part of the well known Rosette Nebula.

naked eye, Bortle 4
Seen as evident, diffuse brightening.

EASY
8" f/6, 37x, Bortle 4
Evident with bright, scattered stars.
EASY

NGC2264 (OC)

DSS
© DSS II (blue) - 60×60'
Name: NGC2264, H5.27, H8.5, Christmas Tree Cluster
Type: OC
Constellation: Mon
Coordinates: 06h40m58.00s / +09°53'42.00"
Brightness / Size: v3.9 mag / 20.0x20.0'
The designation NGC2264 includes also the surrounding nebula like the Cone Nebula. On the DSS image the christmas tree is upside down.

naked eye, Bortle 4, SQM-L 21.0
SQM-L 20.5: Only the 4.66 mag bright S Mon (= 15 Mon) was seen without any problems.

MODERATE
8" f/6, 37x, Bortle 4, SQM-L 21.0
SQM-L 20.5: Quite evident group of 20-30 more scattered stars with overall good contrast to the surrounding. The characteristical shape of a christmas tree was very well discernible.
EASY

NGC2324 (OC)

DSS
© DSS II (red) - 15×15'
Name: NGC2324, H7.38
Type: OC
Constellation: Mon
Coordinates: 07h04m07.00s / +01°02'42.00"
Brightness / Size: v8.4 mag / 8.0x8.0'
8" f/6, 37x, Bortle 4-
Relatively large, consists of rather faint members. Appeared still slightly diffuse. Northward with an angular distance of about 30' there is the bright double star STTA82. Between the cluster and the double a star was evident due to its slightly reddish color.
EASY

NGC2506 (OC)

DSS
© DSS II (red) - 20×20'
Name: NGC2506, Melotte 80, H6.37
Type: OC
Constellation: Mon
Coordinates: 08h00m01.00s / -10°46'12.00"
Brightness / Size: v7.6 mag / 7.0x7.0'
120mm f/5, 18x, Bortle 4, SQM-L 21.1
SQM-L 20.3: At 18x evident, round, slightly condensed, diffuse. Appeared granulous with averted vision. At 40x a few stars popped out, otherwise the cluster stayed nebulous. Not better at 75x.
EASY