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(IAAC) Melotte 72 - 8inch F/10



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 30 December 91, ab20h00UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual): 6,2
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Meade SCT 8-inch F/10
Magnification: 87x
Filters used: no
Object: Melotte 72
Category: open cluster
Constellation: CMa
Object data:  p10.1 - diam.9' - trumpler type II1p - 40 stars of v12: and
fainter
RA/DE: 07h38.4m, -1041'
Description: at 87x, medium sized cluster with a global medium brightness;
a mag7 star is at 10'WNW and another of mag8 at 15'; the cluster is
triangular in shape with 2-3 stars of mag11 and 15 others fainter than
mag12; with averted vision, the cluster field is full of faint stars that
are quite condensed. A partial ring of stars is seen at 20'WNW; at 145x,
somewhat fainter with some areas still unresolved and nebulous; about 10'
in diameter.



Yann Pothier	tel: 01 43 41 43 29
11 impasse Canart, 75012 PARIS, FRANCE
Email: ypothier@abi.snv.jussieu.fr
Site : http://pegase.unice.fr/~skylink/publi/cielextreme