Meteors
Lyrids
General data
| Shower | Lyrids |
|---|---|
| IAU Shower Number | 6 |
| IMO Acronym | LYR |
| Activity interval | Apr 17 - Apr 26 |
| Date of maximum in 2010 | April 22 18:21 UT |
| Geocentric Velocity | 49 km/s |
| Population index | 2.1 |
Notes:
- Population index gives the magnitude distribution of the shower meteors: indexes below 2.5 correspond to distributions where bright meteors are more frequent than average, while values over 3.0 mean that the fraction of faint meteors is larger than usual.
Description
An irregular shower, with rates that can vary between 15 and 90 depending on the year, and with some (rare) outbursts producing much higher rates. It is possible to watch bright fireballs.
Parent body is comet C/1861 G1 (Thatcher).
Radiant position and activity
Local circumstances have been computed for latitude ? and longitude ?. Click on any of the two coordinates to set them manually with a map.
| Date | R.A. | Decl. | ZHR | Rise | % moon |
|---|---|---|---|---|---|
| Maximum | 273° | 33° | 18 | 53 | |
| September 9 (0h UTC) | Inactive | ||||
Meaning of columns is the following:
- R.A. and Decl.: Right ascension and declination of radiant at maximum, referred to ICRS. ICRS is the reference system used by modern star catalogs.
- ZHR: Zenith Hourly Rate. It is the maximum number of meteors that an observer could see under ideal conditions, with clear skies and the radiant at zenith.
- Rise: Time of geometric rise of the radiant, expressed in local time. Symbol * means that the radiant is circumpolar for your latitude.
- % Moon: Percentage of Moon's illumination at 0h UTC of the given date.
If you are in doubt about these concepts, please visit the meteor area.