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(IAAC) IC 351 - 8" F/10



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: IC 351 (PK 159-15.1; PN G159.0-15.1; ARO 19)
Category: planetary nebula
Constellation: PER
Object data: Vmag=11.9; Bmag=12.4; 7"x7" (17"x15" for IDB); type IIa;
central star of Vmag=14.8; discovered by Barnard in 1891; ELCAT: [OIII,
496+501nm] = 16 x [Hbeta, 486nm].
RA/DE: 03h47.5m, +3503' (2000)
Date and UT of observation: 29 December 1991, late evening, about??h?? UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.0 with averted vision
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): ?
Moon up (phase?): no
Instrument: Meade 8" F/10
Magnification: 80-312x
Filters used: OIII, visual spectroscope

Description: located at 80x with the prism (a little fainter than IC 2003);
at 87x and OIII, the contrast gain is generous and confirms its a PN; at
145x, somewhat fuzzy star, bluish with a trio of stars 4' to the ESE
(mag9+11+12); at 312x, small nebulous disc.

I can provide a scanned drawing of IC 351 to anyone who can read the binhex
encoding of Eudora (for Mac); just mail me to try
(ypothier@abi.snv.jussieu.fr), it works quite often with other
configurations...




Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
ypothier@abi.snv.jussieu.fr
ypothier@closun.snv.jussieu.fr
http://www.astrosurf.org/cielextreme
http://www.astrosurf.com/cielextreme
http://astrosurf.org/skylink/publi/cielextreme,


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