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(IAAC) Abell 72 (PK 59-18 1; PN G059.7-18.7)
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 07 July 19947, about 00h00 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
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Coulter Newtonian 17.5" F/4.5
Magnification: x87
=46ilters used: UHC, OIII
Object: Abell 72 (PK 59-18 1; PN G059.7-18.7)
Category: Planetary Nebula
Constellation: DEL
Object data: Vmag=3D13.8; dim.130"x130"; type IIIb; central * Vmag=3D15.04;
discovered by Abell in 1955. ELCAT: [OIII 495+500]=3D20xHbeta
RA/DE: 20h50.1m, +13=B033' (2000); Uranometria 209
Description: at 45x, suspected as a very faint glow that could be mistaken
for a foggy eyepiece artefact; good contrast gain with UHC and very good
one with OIII; at 74x, suspected without filter and well seenwith UHC and
OIII; still suspected at 125x without filter; conclusion: without filter,
nothing clearly seen. At 87x with OIII, big NP, very very faint, perfectly
homogeneous about 3'x2' elongated E-W; a mag8 star is against the W border;
4 stars are scattered on it, one of mag 12 in the center (a little south of
it), one of mag12 at 1'W from center, one of mag14 at 50"NE from the latter
and another of mag14 against the SE edge.
I can provide a scanned drawing of Abell 72 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
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