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(IAAC) He 1-6 (PK 65-5 1; PN G065.2-05.6) - 17.5" F/10
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 29 July 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
Seeing (1 to 5 - best to worst): 2 (pinpointed stars until 145x)
Moon up (phase?): no
Instrument: Coulter 44.5cm/17.5" F/4.5
Magnification: 211x
=46ilters used: UHC, OIII, Hbeta
Object: He 1-6 (PK 65-5 1; PN G065.2-05.6)
Category: Planetary Nebula
Constellation: VUL
Object data: Vmag=3D14.8; dim.46"x24"; type III+II; "elliptical with ansae";
central * Vmag=3D?; discovered by Henize in 1961; ELCAT: [OIII
495+500]=3D12xHbeta
RA/DE: 20h17.3m, +25=B022' (2000); Uranometria 163
Description: at 211x et OIII, smal to medium sized PN, extremely faint
(invisible without filter or just glimpsed at 400x); gradually brighter
center; UHC has a weak contrast gain, OIII a good one and Hbeta is showing
nothing; estimated diameter about 30" (brighter center about 8"); a
triangle of mag13 stars at 1.5'W.
I can provide a scanned drawing of He 1-6 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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