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(IAAC) Me 2-1 (PK 342+27.1; PN G342.1+27.5) - 17.5" F/4.5
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 18 February 1994, morning about 04:30 local time
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): 1.5
Seeing (1 to 5 - best to worst): 4
Moon up (phase?): no
Instrument: Coulter 17.5" (445mm) F/4.5
Magnification: 125-290x
Filters used: not used any (seems 04:30AM is time to sleep:-), visual
spectroscope
Object: Me 2-1 (PK 342+27.1; PN G342.1+27.5; He 2-126, Sa 2-120; ARO 88)
Category: planetary nebula
Constellation: LIB
Object data: Vmag=11.6; Bmag=12.0; dim.7"x7"; type II PN; central star of
Vmag=16.03; discovered by Merrill in 1942; ELCAT: [OIII, 496+501nm] = 19
(!!!) x [Hbeta, 486nm].
RA/DE: 15h22.3m, -23°38' (2000); Uranometria 334
Description: at 125x, quasi-stellar object, bright PN; nice stellar
(point-like) spectra with the 3-prisms device at 80x; about mag11; somewhat
fuzzier at 145x and much more nebulous at 290x than a nearby mag11 star at
1'W; diameter estimated to be less than 20".
I can provide a scanned drawing of Me 2-1 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
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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