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(IAAC) NGC 3242 - 17.5" F/4.5
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 3242 (PK 261-32.1; PN G261.0+32.0; ARO 4)
Category: planetary nebula
Constellation: HYA
Object data: Vmag=7.7; Bmag=8.6; 40"x35"; type IIIb+IV; central star of
Vmag=11.4; discovered by W. Herschel in 1785; ELCAT: [OIII, 496+501nm] = 17
x [Hbeta, 486nm].
RA/DE: 10h24.80m, -18°38.0' (2000.0)
Date and UT of observation: 16 February 1994, early evening
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.2
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: 145-312x
Filters used: OIII
Description: at 145x, bright PN, medium sized (about 70"x49" on drawing),
oval in a NW-SE axis; double-shell clearly seen, even without OIII filter;
central part is annular but the ring is pinched on the SE side and has a
brighter surface on the NW side; the inner ring is only 45"x35"; no central
star visible.
I can provide a scanned drawing of NGC 3242 to anyone who can read the
binhex encoding of Eudora (for Mac); just mail me to try
(yann.pothier@fnac.net), it works quite often with other configurations...
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
yann.pothier@fnac.net
http://www.astrosurf.org/cielextreme
http://www.astrosurf.com/cielextreme
http://astrosurf.org/skylink/publi/cielextreme,
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