[Prev][Next][Index][Thread][Search][Objects]

(IAAC) M 1-79 (PK 93-2 1; PN G093.3-02.4) - 17." F/4.5



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 03 August 1997, about 02h05 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.4
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): 2 (stellar stars until 211x)
Moon up (phase?): no
Instrument: Coulter 17.5" (445mm) F/4.5
Magnification: 400x
=46ilters used: OIII, UHC, Hbeta
Object: M 1-79 (PK 93-2 1; PN G093.3-02.4)
Category: planetary nebula
Constellation: CYG
Object data: Vmag=3D13.2; dim.39"x27" (60"x41" according to IDB); central
star ?; discovered by Minkowski in 1946; ELCAT: OIII [496+501nm]=3D 11 x
Hbeta [486nm]
RA/DE: 21h37.0m, +48=B057' (2000); Uranometria 86;
Description: at 400x + OIII, medium sized PN, faint, oval WNW-ESE,
estimated to be 44"x34" (on drawing) with ill-defined edges; a brighter
crescent appears on the N side; no central star; UHC has a weak contrast
gain, OIII has a strong one and Hbeta has no effect; mag15 and 16 stars are
on the WSW border.
I can provide a scanned drawing of M 1-79 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,
To UNSUBSCRIBE from the 'netastrocatalog' lists, use the Web form at:
http://www.visualdeepsky.org/subscribe.html