Leading Bulgarian astronomers advise sky phenomenon enthusiasts to prepare for an exceptional period of meteor observations this summer. Specialist Pencho Markishki from Sofia University and the National Academy of Sciences reveals the details about the upcoming celestial spectacles.
According to expert recommendations, the optimal time range for meteor observations covers the second half of the night, when the radiants of various meteor streams reach higher visibility angles. This period provides the maximum opportunity for registering astronomical phenomena.
Markishki, author of a specialized handbook for amateur astronomers, points out three main meteor streams that will be accessible this season: Southern Delta-Aquarids, Alpha-Capricornids, and the popular Perseids.
The key observation date is set around July 30-31, when the maximum of the first two streams coincides. In the Sofia area, the lunar sunset is scheduled around 23:21, which creates ideal conditions for astronomical research until the early morning hours.
The technical characteristics of the meteor streams reveal interesting features. The Southern Delta-Aquarids are distinguished by an average intensity of about 25 meteors per hour, with the comet 96P/Machholz presumed to be their source. In parallel, the Alpha-Capricornids offer about 5 slower but extremely bright meteors with characteristic glowing trails.
The most popular meteor stream - the Perseids, will be active from July 17 to August 24. Its maximum in 2025 is forecast for the night between August 12 and 13, although the highly illuminated lunar disk (85%) may hinder observations.
The expert recommends alternative periods at the end of July and the beginning of August, when lunar light will not interfere as strongly with astronomical observations. This advice is especially important for sky phenomenon enthusiasts who want to capture rare meteor showers.
Markishki emphasizes the importance of choosing the right observation period, advising enthusiasts to plan their astronomical expeditions precisely, taking into account the specific characteristics of each meteor stream.