IAU 6 · LYR
April Lyrids
Measurements from the IAU Meteor Data Center. Each parameter set describes an observation campaign; values and proposed parent bodies may differ between sets.
An activity peak is expressed as solar longitude, not a guaranteed calendar date or observing forecast. Radiant coordinates and orbital elements are reported as supplied by the source. Missing values are not reported; these data do not predict an hourly meteor rate.
8 parameter sets returned for this shower. List-page filters do not hide sets here.
Parameter set 0
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- annual
- Shower group
- 00000
- Peak solar longitude
- 32.4 °
- Radiant right ascension
- 272 °
- Radiant declination
- 33.3 °
- Right ascension drift
- Not reported
- Declination drift
- Not reported
- Geocentric speed
- 46.6 km/s
- Semimajor axis
- 45.7 AU
- Perihelion distance
- 0.921 AU
- Eccentricity
- Not reported
- Argument of perihelion
- 214.3 °
- Ascending node
- 31.8 °
- Inclination
- 79.6 °
- Observed members
- Not reported
- Technique
- P
- Submitted on
- SD
- Reported parent body
- C/1861 G1 (Thatcher)
Reference: 1) Dutch Meteor Society 2001
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 1
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- annual
- Shower group
- 00000
- Peak solar longitude
- 32.4 °
- Radiant right ascension
- 271.9 °
- Radiant declination
- 33.3 °
- Right ascension drift
- 1.23 °/day
- Declination drift
- 0.17 °/day
- Geocentric speed
- 47.07 km/s
- Semimajor axis
- 56 AU
- Perihelion distance
- 0.918 AU
- Eccentricity
- Not reported
- Argument of perihelion
- 214.5 °
- Ascending node
- 32.2 °
- Inclination
- 79.5 °
- Observed members
- 7
- Technique
- P
- Submitted on
- SD
- Reported parent body
- C/1861 G1 (Thatcher)
Reference: 2) Kresak and Porubcan, 1970
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 2
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- annual
- Shower group
- 00000
- Peak solar longitude
- 32.4 °
- Radiant right ascension
- 271.9 °
- Radiant declination
- 33.6 °
- Right ascension drift
- 1.1 °/day
- Declination drift
- 0 °/day
- Geocentric speed
- 47.6 km/s
- Semimajor axis
- 28 AU
- Perihelion distance
- 0.919 AU
- Eccentricity
- Not reported
- Argument of perihelion
- 214.3 °
- Ascending node
- 32.5 °
- Inclination
- 79 °
- Observed members
- 5
- Technique
- Not reported
- Submitted on
- SD
- Reported parent body
- C/1861 G1 (Thatcher)
Reference: 3) Cook, 1973
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 3
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- annual
- Shower group
- 00000
- Peak solar longitude
- 32.4 °
- Radiant right ascension
- 272 °
- Radiant declination
- 33.3 °
- Right ascension drift
- Not reported
- Declination drift
- Not reported
- Geocentric speed
- 47.1 km/s
- Semimajor axis
- Not reported
- Perihelion distance
- 0.919 AU
- Eccentricity
- 0.989
- Argument of perihelion
- 214.2 °
- Ascending node
- 32.4 °
- Inclination
- 79.8 °
- Observed members
- 6
- Technique
- P
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 4) Jopek et al., 2003
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 4
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- 2002/06
- Shower group
- 00000
- Peak solar longitude
- 32.5 °
- Radiant right ascension
- 272.3 °
- Radiant declination
- 32.6 °
- Right ascension drift
- 1.5 °/day
- Declination drift
- -0.3 °/day
- Geocentric speed
- 47.3 km/s
- Semimajor axis
- 22.2 AU
- Perihelion distance
- 0.913 AU
- Eccentricity
- 0.9589
- Argument of perihelion
- 215.8 °
- Ascending node
- 32.3 °
- Inclination
- 80.7 °
- Observed members
- 26
- Technique
- R
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 5) Brown et al., 2008
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 5
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- 2007/08
- Shower group
- 00000
- Peak solar longitude
- 32.5 °
- Radiant right ascension
- 272.6 °
- Radiant declination
- 33.2 °
- Right ascension drift
- 0.82 °/day
- Declination drift
- -0.29 °/day
- Geocentric speed
- 46.7 km/s
- Semimajor axis
- Not reported
- Perihelion distance
- Not reported
- Eccentricity
- Not reported
- Argument of perihelion
- Not reported
- Ascending node
- Not reported
- Inclination
- Not reported
- Observed members
- 73
- Technique
- T
- Submitted on
- SD
- Reported parent body
- C/1861 G1 (Thatcher)
Reference: 6) SonotaCo, 2009
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 6
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- 2002/08
- Shower group
- 00000
- Peak solar longitude
- 32 °
- Radiant right ascension
- 272.2 °
- Radiant declination
- 32.6 °
- Right ascension drift
- 0.62 °/day
- Declination drift
- -0.33 °/day
- Geocentric speed
- 46.6 km/s
- Semimajor axis
- 10.85 AU
- Perihelion distance
- 0.9149 AU
- Eccentricity
- 0.916
- Argument of perihelion
- 215.71 °
- Ascending node
- 32 °
- Inclination
- 80 °
- Observed members
- 1,197
- Technique
- R
- Submitted on
- SD
- Reported parent body
- C/1861 G1 (Thatcher)
Reference: 7) Brown et al., 2010
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 7
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- annual
- Shower group
- 00000
- Peak solar longitude
- 32 °
- Radiant right ascension
- 272 °
- Radiant declination
- 33.4 °
- Right ascension drift
- 0.66 °/day
- Declination drift
- 0.02 °/day
- Geocentric speed
- 46.7 km/s
- Semimajor axis
- 10.8 AU
- Perihelion distance
- 0.921 AU
- Eccentricity
- 0.956
- Argument of perihelion
- 214 °
- Ascending node
- 32.3 °
- Inclination
- 79.4 °
- Observed members
- 258
- Technique
- T
- Submitted on
- SD
- Reported parent body
- C/1861 G1 (Thatcher)
Reference: 8) Jenniskens et al., 2016, Icarus, 266, 331
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)