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(IAAC) Melotte 71 - 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 71
Category: open cluster
Constellation: CMa
Object data: v7.1 - diam.9' - trumpler type II1m - 80 stars of v10.2 and
fainter
RA/DE: 07h37.5m, -12°04'
Description: at 87x, medium to large, nice cluster, well resolved but some
areas are still nebulous; globally medium in brightness; 3 stars of mag9
are forming a triangle on the W border; estimated overall diameter of 10';
at 145x, about 20 stars are resolved from mag11 to 13 with 2 stars of mag10
on the SW border.
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