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Last update: 2017-07-26

VdS FG

- Open Clusters & Asterisms (Aur) -

And (3) Cep (22) Cyg (22) 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)

M36 (OC)

DSS
© DSS II (blue) - 20×20'
Name: M36, NGC1960
Type: OC
Constellation: Aur
Coordinates: 05h36m18.00s / +34°08'24.0"
Brightness / Size: v6.0 mag / 12.0×12.0'
B 40mm, 8x, Bortle 7, NELM 4.5, SQM-L 18.9
SQM-L 18.5: Apparent with brighter center, appeared relatively small.

EASY
B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Evident, round, diffuse brightening with rather compact, brighter center. Several stars seen with averted vision, background still diffuse. Somewhat smaller than M38. Together with M37 & M38 an awesome view.

EASY
B 70mm, 15x, Bortle 4
Despite an altitude of 11° easily seen. Obvious, bright, diffuse, not resolved.

EASY
4.5" f/8, 28x, Bortle 6-, NELM 5.0, SQM-L 18.9
Quite evident, consists of brighter and moderately bright stars, slightly concentrated toward the middle, irregular, outstanding star chain.

EASY
8" f/6, 37x, Bortle 4
Good contrast to the surrounding. In comparison to M37 and M38 fairly poor with some brighter and fainter stars arranged in chains. Slight concentrating toward the middle.
EASY

M37 (OC)

DSS
© DSS I - 30×30'
Name: M37, NGC2099
Type: OC
Constellation: Aur
Coordinates: 05h52m18.00s / +32°33'12.0"
Brightness / Size: v5.6 mag / 24.0×24.0'
Awesome under dark skies. Under light polluted skies the cluster gets more lost due to its fainter members.

B 40mm, 8x, Bortle 7, NELM 4.5, SQM-L 18.9
SQM-L 18.5: Barely visible with direct vision, relatively large, diffuse, somewhat brighter center.

EASY
B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Evident, round, relatively large, diffuse brightening with somewhat brighter center. Not resolvable. Together with M36 & M38 an awesome view.

EASY
4.5" f/8, 28x, Bortle 6-, NELM 5.0, SQM-L 18.9
Evident, but overall quite faint. Many fainter members visible with averted vision, similar in brightness, almost evenly distributed.

EASY
120mm f/5, 18x, Bortle 6, SQM-L 19.3
At 18x central star quite obvious, cluster itself appeared more as a granulous, almost round brightening. At 50x well resolvable with many faint members.

EASY
8" f/6, 37x, Bortle 4
Very evident. Extremely rich with mainly fainter stars. In the center a brighter, orange colored star is evident. Poor regions within the cluster, stars itself arranged in groups and chains.
EASY

M38 (OC)

DSS
© DSS II (blue) - 30×30'
Name: M38, NGC1912
Type: OC
Constellation: Aur
Coordinates: 05h28m43.00s / +35°51'18.0"
Brightness / Size: v6.4 mag / 21.0×21.0'
B 40mm, 8x, Bortle 7, NELM 4.5, SQM-L 18.9
SQM-L 18.5: Relatively faint, evenly bright, diffuse.

MODERATE
B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Evident, almost evenly bright, irregular shape. Some stars seen with averted vision, otherwise diffuse. Somewhat larger than M36. Together with M36 & M37 an awesome view.

EASY
B 70mm, 15x, Bortle 4
Altitude of about 13°. Similar to M36, but larger and fainter. Relatively evident, diffuse, not resolved.

EASY
80mm f/6.25, 20x, Bortle 6-, NELM 5.0+, SQM-L 19.6
Concentrated toward the center with radial star chains, so that the shape of the cluster appears irregular. At 50x there was an apparent star in the center with no stars in the direct vicinity (like a hole in the center).

EASY
4.5" f/8, 28x, Bortle 6-, NELM 5.0, SQM-L 18.9
Rather faint members. The cluster is more dominated by star chains, so it appears more irregular.

EASY
8" f/6, 37x, Bortle 5
Quite concentrated toward the middle, star rich, mainly moderately bright and fainter stars.
EASY

NGC1664 (OC)

DSS
© DSS II (blue) - 25×25'
Name: NGC1664, H8.59
Type: OC
Constellation: Aur
Coordinates: 04h51m06.00s / +43°40'30.0"
Brightness / Size: v7.6 mag / 18.0×18.0'
Very nice cluster. Recommended!

80mm f/6.25, 25x, Bortle 6, NELM 5.2
Quite evident, rather faint, resolved.

EASY
8" f/6, 37x, Bortle 4
Located near a 7.47 mag star and seen as a star cloud consisting of many fainter stars. Very evident, fairly large, rich.
EASY

NGC1907 (OC)

DSS
© DSS II (blue) - 12×12'
Name: NGC1907, H7.39
Type: OC
Constellation: Aur
Coordinates: 05h28m05.00s / +35°19'30.0"
Brightness / Size: v8.2 mag / 7.0×7.0'
B 40mm, 8x, Bortle 4-, NELM 5.7+, SQM-L 20.9
Fairly well seen with averted vision as small, diffuse brightening.

MODERATE
80mm f/6.25, 50x, Bortle 6-, NELM 5.0+, SQM-L 19.6
At 20x quite small, diffuse, slightly oval brightening. At 50x I could saw two stars (probably the two stars at the south edge) of similar brightness, otherwise the cluster appeared very diffuse.

EASY
4.5" f/8, 28x, Bortle 6-, NELM 5.0, SQM-L 18.9
Nearby a star pair, evenly bright oval.

MODERATE
8" f/6, 37x, Bortle 5
At 37x more diffuse, fairly small, grany with averted vision. At 100x resolved, consists of preferably fainter stars, still small size. Located near an evident pair of stars.
EASY

NGC2281 (OC)

DSS
© DSS I - 20×20'
Name: NGC2281, H8.71
Type: OC
Constellation: Aur
Coordinates: 06h48m17.00s / +41°04'42.0"
Brightness / Size: v5.4 mag / 15.0×15.0'
8" f/6, 37x, Bortle 4
Evident group of about 20-30 medium bright and fainter stars. Cluster is more loose with slight concentration toward the middle. Good contrast to the surrounding.
EASY