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(IAAC) IC 348 / 17.5-inch F/4.5



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 01 November 1994, about 00h00 UT
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: Coulter 17.5" F/4.5
Magnification: 125x
Filters used: no
Object: IC 342 (=IC 1985)
Category: open cluster + gazeous nebula
Constellation: PER
Object data:  OCv7.3 / BN=120'x60' / OC=diam.10'/Trumpler type IV2p; around
omicron PER of mag.4; containing 20 stars of v8.53 and fainter.
RA/DE:03h44.5m, +3217' (2000); Uranometria 95
Description: cluster of about 15 stars of mag.9 to 14, crown-shaped,
estimated diameter of 7.2'; star of mag.9 on the NE side of the cluster;
double star of mag.9.5+9.5 about 17" in NW; the nebula is visible centered
on the mag.9 star already cited, like a large halo of dirty optics, about
3' in diameter, easy to see and medium sized for a nebula but still
considered as faint after all; not better with UHC; edges gradually and
smoothly fading in the background sky; the nebula is hard but
distinguishable at 45x and stil visible at 312x. Interesting object since
no nebula is visible (to me) in a 8".

I can provide a scanned drawing of IC 342 to anyone who can read the binhex
encoding of Eudora (for Mac); just mail me to try
(ypothier@abi.snv.jussieu.fr), it works sometimes with other
configurations...



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


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



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