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Watching, Counting and Photographing the Perseids
By Joe Rao
Special to SPACE.com
posted: 02:55 pm ET
07 August 2002

Watching, Counting and Photographing the Perseids

Watching for Perseid meteors consists of lying back, gazing up into the stars, and waiting. It is customary to watch the point halfway between the radiant (which will be rising in the northeast sky) and the zenith directly overhead, though its all right for your gaze to wander.

Making a meteor count is as simple as lying in a lawn chair or on the ground and marking on a clipboard whenever a shooting star is seen.

Counts should be made on several nights before and after the predicted maximum, so the behavior of the shower away from its peak can be determined. Usually, good numbers of meteors should be seen on the preceding and following nights.

The shower is generally at one-quarter strength two or three days before maximum. A few Perseids can be seen as much as two weeks before and a week after the peak. The extreme limits, in fact, are said to extend from July 25 to August 18, though an occasional one may be seen almost anytime during the month of August.

Perseid pictures

The Perseids are also an excellent meteor display to attempt to photograph.

Meteor photography is popular and can be carried out with practically any camera. The chance of recording a meteor is enhanced by using a fast lens (f 2.8 or better) and ultrafast film (ISO 400 to 1600). It makes no difference whether the camera is clock-driven or fixed on a tripod.

In a dark sky, exposures of 10 to 20 minutes long can be made, but should be kept much shorter if background light threatens to fog the film. Slight moonlight, twilight or city glow can be tolerated, as they have little to do with the efficiency of a particular lens-film combination in recording bright meteors.

A successful photograph has much added value if an observer has witnessed and described the same meteor. Also, the chance of obtaining a good meteor picture can be increased by pointing the camera well away from the radiant.

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