{"version":1,"generatedAt":"2026-10-28T10:38:56.207Z","kind":"meteor-shower-peak","name":"Ursids 2027","shower":{"id":"ursids","name":"Ursids","parent":"Comet 8P/Tuttle","zhr":10,"populationIndex":3,"velocityKmS":33},"peak":{"at":"2027-12-23T04:11:28.000Z","solarLongitudeJ2000":270.7},"radiant":{"ra":14.47,"dec":75.9,"frame":"J2000","raUnit":"hours","decUnit":"degrees"},"moonAtPeak":{"phase":"Waning Crescent","illumination":0.21},"visibility":{"neverRisesBeyond":{"hemisphere":"south","latitude":14.1},"neverSetsBeyond":{"hemisphere":"north","latitude":14.1},"nightOf":"2027-12-22","longitude":0,"skyBortle":5,"bands":[{"latitude":60,"verdict":"good","summary":"About 5.4 an hour","radiantHighestAt":"2027-12-23T06:10:51.793Z","radiantAltitude":71,"perHour":5.4,"fullyDark":true,"moon":{"illumination":0.21,"up":true}},{"latitude":45,"verdict":"good","summary":"About 4.7 an hour","radiantHighestAt":"2027-12-23T05:48:24.194Z","radiantAltitude":55,"perHour":4.7,"fullyDark":true,"moon":{"illumination":0.21,"up":true}},{"latitude":30,"verdict":"good","summary":"About 3.6 an hour","radiantHighestAt":"2027-12-23T05:20:28.033Z","radiantAltitude":39,"perHour":3.6,"fullyDark":true,"moon":{"illumination":0.21,"up":true}},{"latitude":15,"verdict":"good","summary":"About 2.3 an hour","radiantHighestAt":"2027-12-23T05:02:23.012Z","radiantAltitude":24,"perHour":2.3,"fullyDark":true,"moon":{"illumination":0.21,"up":true}},{"latitude":0,"verdict":"few","summary":"Hardly any: about 0.8 an hour at best","radiantHighestAt":"2027-12-23T04:37:20.113Z","radiantAltitude":8,"perHour":0.8,"fullyDark":true,"moon":{"illumination":0.21,"up":true}},{"latitude":-15,"verdict":"never-rises","summary":"The radiant never rises","radiantHighestAt":null,"radiantAltitude":null,"perHour":null,"fullyDark":true,"moon":{"illumination":0.23,"up":true}},{"latitude":-30,"verdict":"never-rises","summary":"The radiant never rises","radiantHighestAt":null,"radiantAltitude":null,"perHour":null,"fullyDark":true,"moon":{"illumination":0.23,"up":true}},{"latitude":-45,"verdict":"never-rises","summary":"The radiant never rises","radiantHighestAt":null,"radiantAltitude":null,"perHour":null,"fullyDark":true,"moon":{"illumination":0.23,"up":true}}]},"links":{"page":"https://www.whatthestar.com/meteor-showers/ursids-2027","map":"https://www.whatthestar.com/explore?ra=14.47&dec=75.9&fov=40&t=2027-12-23T04%3A11%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/"}]}