What do you need to prepare for observing meteor showers in the field?

Of all astronomical phenomena, meteor shower is probably the most romantic. It is beautiful and dreamy because of its fleeting brilliance and the expectation of getting what you want. Every midsummer night around Tanabata, the Perseid meteor shower, the first of the three major meteor showers in the northern hemisphere, will bring gorgeous starlight as promised.

Perseid meteor shower, as the earliest recorded meteor shower in human history, is the most easily observed meteor shower for non-professionals because of its stable zenith flow, high speed and many bright meteors.

People often complain that this phenomenon is exaggerated. It is true that some reports like to forecast "rain in Mao Mao" as "heavy rain", but whether it can be seen or not is actually related to the way it opens. Today, we will start with the reasons and talk about how to watch and shoot this sky drama.

Preparation before observation: First of all, you should be familiar with the starry sky, know the constellations around the meteor shower radiation point and the names of the main stars, and also prepare star maps, record sheets, pens, small flashlights (wrapped in red cloth or red paper), calibrated clocks and other necessary supplies, as well as cold-proof and dew-proof items such as seats and clothes.

When observing, count the meteors. If you observe in pairs, one counts the number of meteors and the other records the time and the number of meteors. Sometimes there are too many meteors to remember, so you can prepare a small notebook. When you see a fashion, draw a line on the notebook with a pencil and count the number of strokes divided by the time interval to get the ratio of seeing meteors. Record the start and end times when counting. At the same time, you need to fill in the Visual Observation Record of Leonid Meteor Shower. Because of long-term observation, it is necessary to maintain a comfortable posture. Of course, Leonid meteor showers all appear in June 5438+065438+ 10. It is very cold in the middle of the night in winter, so we must pay attention to keep warm.

Observing meteor showers can also be used to photograph the beauty of meteor showers. A camera with B-door and high-sensitivity film is needed for shooting. The specific shooting method is: fix the camera on a stable tripod, set the focal length of the lens to infinity, open the aperture to the maximum, and then aim at the selected sky area to start exposure. Each exposure time generally does not exceed 5 minutes. This method can be described as "waiting for the rabbit". .