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(IAAC) M2-9 (PK 10+18 2; PN G010.8+18.0) - 17.5inch F/4.5



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 22 August 1998, about 22h00 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): 4 (stellar stars until 125x)
Moon up (phase?): no
Instrument: Coulter 17.5" F/4.5
Magnification: 211x
=46ilters used: UHC, OIII, Hbeta
Object: M2-9 (PK 10+18 2; PN G010.8+18.0)
Category: Planetary Nebula
Constellation: OPH
Object data: Vmag=3D14.6; dim.20"; type ?+VI; central * of Vmag=3D15.65;
discovered by Minkowski in 1947; Hbeta and OIII fluxes equal (ELCAT).
RA/DE: 17h05.6m, -10=B008' (2000); Uranometria 292
Description: at 211x and OIII, small to medium nebula (for a PN), very
faint, bipolar since 211x because the central star appears detached from 2
wings (ansae) giving an overall shape estimated to be 25"x12" in a N-S
axis; UHC and OIII are both giving the same little contrast gain, Hbeta
doesn't help.
I can provide a scanned drawing of M2-9 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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