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m47 Puppis

Object:

NGC 2422 (M47)

Constellation:

Puppis

RA:

07h36m36s

DEC:

-14030'00"

Magnification:

62,5

Filter:

None

Field:

46,5'

Pos. Angle:

-

Object Info:

M47 is an open cluster Trumpler Type I 2 m. It's visual magnitude is 4.4. It is a very easy object to find. Normally under clear dark skies it is visible with the naked eye. In my 8 x 50 viewfinder it was even visible very low at the horizon under bad conditions. It is a bright object. The size is about 25' x 30' (very large). It has an irregular shape. There is a "cross-like" star formation in the lower half of the cluster. On the southern tip of this "cross-like" formation is a nice double star visible. There are 5 or 6 chains of stars. There are several empty spaces and lanes in the cluster. There is no central star. The brightest star is of magnitude 5.8. The magnitude ranges from about 5.8 to 11 in my scope. There is no glow of unresolve stars.

Orientation:

North is up, west is to the left

Miscallenous information

Date:

10-March-2002

Time (GMT):

19.00.00

Location:

50.55N 6.03E

Experience:

Beginner

Instrument:

8 inch klevtsov-cassegrain TAL 200K

Magnification used

62,5

Filters used:

None

The Seeing:

5. (1 = best, scale of 10)
Twinkling stars are quiet apparent, but the twinkling is not rapid. Images are unsharp at medium powers.

Transparency:

3. (1 = best, scale of 10)
Haze is noticable towards the horizon, but the overhead sky is perfectly transparent.

The sky darkness:

9. (1 = best, scale of 10)
Sky is very bright, faintest stars visible are mag 4.5.

Naked eye limiting magnitude:

4.5

Moonfase:

No moon visible