(IAAC) M 1-64 (PK 64+15 1; PN G064.9+15.5) - 8inch F/10

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 20 July 1993, about 21h30 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: Meade SCT 8"/20cm F/10
Magnification: 145x
=46ilters used: UHC, OIII
Object: M 1-64 (PK 64+15 1; PN G064.9+15.5)
Category: Planetary Nebula
Constellation: LYR
Object data: Vmag=3D13.3; dim.22"x19"; type IV; "elliptical with inner
structures"; central * Vmag=3D?; discovered by Minkowski in 1964; ELCAT:
[OIII 495+500]=3D8xHbeta
RA/DE: 19h50m02s, +35=B014'36" (2000); Uranometria 117
Description: at 145x, small PN, very faint, nebulous since 100x; estimated
diameter about 20", maybe a little elongated N-S; UHC and OIII filters have
a small contrast gain; difficult at 87x but well seen at 145x with averted
vision; very clearly nebulous at 312x; mag8 star at 6'N, wide double
(30"SO) of mag10+11 at 6'SSO.
I can provide a scanned drawing of M1-64 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
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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