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(IAAC) Collinder 421 - 4.25" F/7.8



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: July 13th 1991, ab.21hTU
Location & latitude: La Clapiere Obs.  (France, latN44 40 00, longE06 27 36)
Site classification: rural, mountain valley, alt.1650m (5500ft)
Limiting magnitude (visual): 6,0
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Newtonian 4.25" F/7.8
Magnification: 36x
Filters used: no
Object: Collinder 421
Category: open cluster
Constellation: Cyg
Object data:  diam. 5.0' - 50' North of NGC 6910
RA/DE: 20h23.3, +4142'
Description: faint cluster of 10 stars of mag.11-12 scattered on a 5' arear.



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