Comet Ikeya-Zhang

March 16, 2002, 03:15 UT
Instrument: 10-inch Starfinder

What a show! I stepped outside on the back deck to see if the comet would be visible through the darkening twilight. The view wasn't what I expected. A thin crescent Moon hung low over Flagstaff with the remaining Earth-facing side illuminated by earthshine. Venus blazed near the horizon and a bright flare-like object was rising slowly through the sky right above the goddess of love. This flare was surrounded by an irregular misty glow. It was a rocket launch from Vandenberg Air Force Base in California. I followed the rocket's rise with my 10X50 binoculars and, after the burn stopped, watched as the exhaust plume slowly dissipated. Remembering my initial reason for stepping outside, I pointed the binocs at Aries, swung toward the horizon and Eta Piscium, and saw the comet about a degree from Eta.

When astronomical twilight finally ended, I went back outside. Ikeya-Zhang was visible to the naked eye 1.5 degrees west-northwest of Eta Piscium. The view in my 10X50's is presented in the sketch at left. The drawing is oriented with north to the upper right. The comet features a bright elongated core region embedded within a blue-white coma. This is positioned 24' due south of 7.0 magnitude HD 8626. The dust tail can be followed to the east-northeast toward Beta and Gamma Arietis for a distance of four degrees under direct scrutiny. With averted vision, the tail can be traced another three degrees. The plasma tail appears as a feathered south edge along the dust tail. Sixty-one stars are shown in the sketch, including Eta Piscium, to the upper left of the comet, and Beta and Gamma Arietis, at the top of the field.


March 5, 2002 May 12, 2002

line

Navigation Image, see text links below Web Links Glossary Sketching Astrophotography Planetary Observing Deep-sky Observing Getting Started About Cosmic Voyage Home

Home | About Cosmic Voyage | Getting Started | Deep-sky Observing | Planetary Observing | Astrophotography | Sketching | Glossary | Web Links

line

URL: http://www.cosmicvoyage.net
Layout, design & revisions © W. D. Ferris
Comments and Suggestions: wdferris1@gmail.com

Revised: May 13, 2002 [WDF]