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NGC40 (Planetary Nebula, in Cepheus, Est. RaDec 00h13.0m, +72d32')
Observer: Dave Mitsky (e-mail: djm28@psu.edu, web: http://www.ezonline.com/ash/obs.htm)
Instrument: 20-inch equatorial reflector Location: Harrisburg, PA, USA
Light pollution: light Transparency: good Seeing: fair
Time: Wed Oct 13 01:10:00 1999 UT Obs. no.: 485
I spent some time on Wednesday night observing with a 20" f/10 classical Cassegrain, a 28mm orthoscopic eyepiece, and a Rainbow Optics StarSpectroscope diffraction grating. My friends and I viewed the spectrum of the Wolf-Rayet central star of the tenth magnitude Herschel 400 planetary nebula NGC 40. Ionized carbon produced a bright emission line in the star's spectrum. A bit later we looked at the many dark absorption lines in the spectrum of the variable star Mira. Mira, a type M supergiant, was dimly visible to the unaided eye.Also observed were the crescent moon, M57 and possibly the nearby 15th magnitude galaxy IC 1296, M8, NGC 40, a fading Comet Lee, Jupiter, and the 11th magnitude galaxy NGC 7448. We used a 40mm Orion UltraScan (127x), a 25mm University Optics MK-70 (203x), and a 16.8mm Orion MegaVista (302x) during the course of the evening, which turned out to be one of those where more talking was done than observing.A shadow transit by Io was underway. As my friends and I watched we employed a 7" aperture mask as the seeing was marginal. Io transited the CM around 02:00 UT and the GRS was near Jupiter's trailing limb about that time.
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Questions? Problems? E-mail jbc@west.net
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