{"version":1,"generatedAt":"2026-10-28T10:38:56.207Z","kind":"meteor-shower-peak","name":"Leonids 2027","shower":{"id":"leonids","name":"Leonids","parent":"Comet Tempel-Tuttle","zhr":15,"populationIndex":2.5,"velocityKmS":71},"peak":{"at":"2027-11-18T05:49:55.000Z","solarLongitudeJ2000":235.27},"radiant":{"ra":10.13,"dec":21.6,"frame":"J2000","raUnit":"hours","decUnit":"degrees"},"moonAtPeak":{"phase":"Waning Gibbous","illumination":0.8},"visibility":{"neverRisesBeyond":{"hemisphere":"south","latitude":68.4},"neverSetsBeyond":{"hemisphere":"north","latitude":68.4},"nightOf":"2027-11-17","longitude":0,"skyBortle":5,"bands":[{"latitude":60,"verdict":"moonlit","summary":"About 5.2 an hour; a Moon 80% lit drowns the faint ones","radiantHighestAt":"2027-11-18T05:27:44.410Z","radiantAltitude":50,"perHour":5.2,"fullyDark":true,"moon":{"illumination":0.8,"up":true}},{"latitude":45,"verdict":"moonlit","summary":"About 5.3 an hour; a Moon 80% lit drowns the faint ones","radiantHighestAt":"2027-11-18T05:11:50.258Z","radiantAltitude":62,"perHour":5.3,"fullyDark":true,"moon":{"illumination":0.8,"up":true}},{"latitude":30,"verdict":"moonlit","summary":"About 5 an hour; a Moon 80% lit drowns the faint ones","radiantHighestAt":"2027-11-18T04:56:00.225Z","radiantAltitude":69,"perHour":5,"fullyDark":true,"moon":{"illumination":0.8,"up":true}},{"latitude":15,"verdict":"moonlit","summary":"About 4.8 an hour; a Moon 80% lit drowns the faint ones","radiantHighestAt":"2027-11-18T04:41:54.951Z","radiantAltitude":66,"perHour":4.8,"fullyDark":true,"moon":{"illumination":0.8,"up":true}},{"latitude":0,"verdict":"moonlit","summary":"About 4.7 an hour; a Moon 80% lit drowns the faint ones","radiantHighestAt":"2027-11-18T04:21:18.766Z","radiantAltitude":54,"perHour":4.7,"fullyDark":true,"moon":{"illumination":0.8,"up":true}},{"latitude":-15,"verdict":"moonlit","summary":"About 4.2 an hour; a Moon 81% lit drowns the faint ones","radiantHighestAt":"2027-11-18T03:57:07.939Z","radiantAltitude":39,"perHour":4.2,"fullyDark":true,"moon":{"illumination":0.81,"up":true}},{"latitude":-30,"verdict":"moonlit","summary":"About 2.7 an hour; a Moon 81% lit drowns the faint ones","radiantHighestAt":"2027-11-18T03:15:59.803Z","radiantAltitude":22,"perHour":2.7,"fullyDark":true,"moon":{"illumination":0.81,"up":true}},{"latitude":-45,"verdict":"few","summary":"Hardly any: about 0.1 an hour at best","radiantHighestAt":"2027-11-18T02:00:46.536Z","radiantAltitude":1,"perHour":0.1,"fullyDark":true,"moon":{"illumination":0.81,"up":true}}]},"links":{"page":"https://www.whatthestar.com/meteor-showers/leonids-2027","map":"https://www.whatthestar.com/explore?ra=10.13&dec=21.6&fov=40&t=2027-11-18T05%3A50%3A00.000Z"},"sources":[{"name":"International Meteor Organization, Meteor Shower Calendar (J. Rendtel): each maximum’s solar longitude, ZHR, population index and radiant","url":"https://www.imo.net/"},{"name":"J. Meeus, Astronomical Algorithms, ch. 25 (the Sun) and ch. 47–48 (the Moon), as the map draws them","url":"https://www.whatthestar.com/credits#method-moon"},{"name":"U.S. Naval Observatory, Astronomical Applications: the Moon’s illuminated fraction, which the tests hold these to","url":"https://aa.usno.navy.mil/data/"}]}