(IAAC) IC 2003 - 17.5" F/4.5

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: IC 2003 (PK 161-14.1; PN G161.2-14.8; ARO 76)
Category: planetary nebula
Constellation: PER
Object data: Vmag=11.4; Bmag=12.6; 7"x6" (21"x19" in IDB); type II; central
star of Vmag=15.3; discovered by Espin before 1908; ELCAT: [OIII,
496+501nm] = 15 x [Hbeta, 486nm].
RA/DE: 03h56.37m, +3352.5' (2000)
Date and UT of observation: 01 November 1991, about 00h30 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.00 with averted vision
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Coulter 445mm/17.5" F/4.5
Magnification: 211-400x
Filters used: OIII
Description: visible at 45x; just non-stellar at 125x; OIII filter provides
a very good contrast gain; at 145x and OIII, homognenous and sharp, about
9" in diameter, shapeless; a mag13.5 is 12" to the SW.
I can provide a scanned drawing of IC 2003 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
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
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