Bright Comet Graces Northern Skys

SKYNIGHTLY

An image of Comet Ikeya-Zhang on the evening of Thursday, March 22, 2002, taken by the MicroObservatory telescope in Cambridge. The MicroObservatory project, created by the Science Education group at the Harvard-Smithsonian Center for Astrophysics, allows students and teachers across the nation to use telescopes over the Internet to take pictures of objects in the night sky.

Boston - Mar 22, 2002
The brightest comet since 1997's Hale-Bopp is currently gracing the western skies of North America. Comet Ikeya-Zhang (pronounced "ee-KAY-uh JONG") was discovered on February 1st by two amateur astronomers in Japan and China, respectively.

Calculations of the comet's orbit by Brian Marsden of the Harvard-Smithsonian Center for Astrophysics show that it was last seen in 1661. This makes Ikeya-Zhang the first long-period comet (a comet with a period longer than 200 years) to be identified on its return to the inner solar system.

No telescope is necessary to look at this beautiful visitor as it swings around the Sun and heads back to deep space. The comet has brightened to naked-eye visibility, but is easiest to see through binoculars.

Comet Ikeya-Zhang has a very long, narrow orbit that stretches well beyond the orbit of Pluto. Its last sweep through the inner solar system occurred in 1661. This time around, the comet will pass between the Sun and Earth, with its closest approach to the Sun occurring on March 18th. Click on the image for a high-resolution, publication-quality version. � Larry Koehn, courtesy Sky & Telescope.
A casual glance will show the bright, starlike nucleus surrounded by a fuzzy cloud of dust and gas called the coma. The comet's tail streaks away from the Sun, pointing nearly straight up from the horizon.

To find Comet Ikeya-Zhang, look in the western sky shortly after sunset. A red point of light about 18 degrees up in the sky is the planet Mars. (An outspread hand at arm's length covers about 15 degrees, so Mars is a bit higher than one hand-span.)

To the right of Mars are two bright stars in a nearly vertical line. The comet is at the same height as Mars, to the right of the two bright stars about as far again as the distance from Mars to the stars.

Headquartered in Cambridge, Massachusetts, the Harvard-Smithsonian Center for Astrophysics (CfA) is a joint collaboration between the Smithsonian Astrophysical Observatory and the Harvard College Observatory. CfA scientists organized into seven research divisions study the origin, evolution, and ultimate fate of the universe.

SKYNIGHTLY

Comet "Ikeya-Zhang" Returns 341 Years Later

Washington - Mar 6, 2002
A comet discovered last month by amateur astronomers is making its first pass through the inner solar system in nearly 3-1/2 centuries. Named Ikeya-Zhang [pronounced "ee-KAY-uh JONG"] for the two keen-eyed skygazers who first spotted it, this cosmic interloper can be seen low in the west, not far above the horizon, as soon as it gets dark.

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