[Prev][Next][Index][Thread][Search][Objects]
(IAAC) IC 432 - 17.5inch F/4.5
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 9 February 1997, about 23h00 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.31
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Coulter 17.5" F/4.5
Magnification: 211x
=46ilters used: UHC and W38A
Object: IC 432 (vdB 51)
Category: Diffuse Nebula (reflection)
Constellation: ORI
Object data: 6'x4'; excited by SAO132446 (v8.2) and sp.B5
RA/DE: 05h40.9m, -01=B029' (2000); Uranometria 225
Description: medium-sized nebula, medium brightness, round with ill-defined
edges; Gauss-curved surface brightness; UHC and W38A (blue filter) are
helping very slightly (reducing skyglow without degrading too much the
nebula); estimated diameter 2.2' and central star of about mag.8-9 with
faint companion of mag14 at 40"W.
I can provide a scanned drawing of IC 432 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