IAU 31 · ETA
eta Aquariids
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.
9 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
- 46.9 °
- Radiant right ascension
- 336.9 °
- Radiant declination
- -1.5 °
- Right ascension drift
- 0.76 °/day
- Declination drift
- 0.422 °/day
- Geocentric speed
- 65.9 km/s
- Semimajor axis
- 16.16 AU
- Perihelion distance
- 0.581 AU
- Eccentricity
- Not reported
- Argument of perihelion
- 97.9 °
- Ascending node
- 44.44 °
- Inclination
- 163.9 °
- Observed members
- 23
- Technique
- Not reported
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 1) Lindblad et al., 1994
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
- 45.6 °
- Radiant right ascension
- 339 °
- Radiant declination
- -1.4 °
- Right ascension drift
- 0.73 °/day
- Declination drift
- 0.31 °/day
- Geocentric speed
- 65 km/s
- Semimajor axis
- Not reported
- Perihelion distance
- 0.545 AU
- Eccentricity
- 0.953
- Argument of perihelion
- 91.9 °
- Ascending node
- 45.6 °
- Inclination
- 165.1 °
- Observed members
- 942
- Technique
- R
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 2) Galligan and Baggaley, 2002
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
- 46.9 °
- Radiant right ascension
- 338.02 °
- Radiant declination
- -1.75 °
- Right ascension drift
- 0.888 °/day
- Declination drift
- 0.456 °/day
- Geocentric speed
- Not reported
- Semimajor axis
- 29.8 AU
- Perihelion distance
- 0.612 AU
- Eccentricity
- 0.983
- Argument of perihelion
- 101.5 °
- Ascending node
- 45.79 °
- Inclination
- 165.5 °
- Observed members
- 11
- Technique
- P
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 3) Lindblad, 1990
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
- 2002/06
- Shower group
- 00000
- Peak solar longitude
- 45.5 °
- Radiant right ascension
- 338 °
- Radiant declination
- -0.7 °
- Right ascension drift
- 0.69 °/day
- Declination drift
- 0.33 °/day
- Geocentric speed
- 64.6 km/s
- Semimajor axis
- 7.07 AU
- Perihelion distance
- 0.537 AU
- Eccentricity
- 0.924
- Argument of perihelion
- 91.6 °
- Ascending node
- 45.1 °
- Inclination
- 162.9 °
- Observed members
- 1,784
- Technique
- R
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 4) Brown et al., 2008
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
- 2007/08
- Shower group
- 00000
- Peak solar longitude
- 46.3 °
- Radiant right ascension
- 338.3 °
- Radiant declination
- -0.8 °
- Right ascension drift
- 0.62 °/day
- Declination drift
- 0.29 °/day
- Geocentric speed
- 65.4 km/s
- Semimajor axis
- 20.881 AU
- Perihelion distance
- 0.662 AU
- Eccentricity
- 0.968
- Argument of perihelion
- 107.9 °
- Ascending node
- 58.1 °
- Inclination
- 166.1 °
- Observed members
- 220
- Technique
- T
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 5) SonotaCo, 2009
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
- 2002
- Shower group
- 00000
- Peak solar longitude
- 58.1 °
- Radiant right ascension
- 347.2 °
- Radiant declination
- 2.1 °
- Right ascension drift
- Not reported
- Declination drift
- Not reported
- Geocentric speed
- 66.9 km/s
- Semimajor axis
- 20.881 AU
- Perihelion distance
- 0.662 AU
- Eccentricity
- 0.968
- Argument of perihelion
- 107.9 °
- Ascending node
- 58.1 °
- Inclination
- 166.1 °
- Observed members
- 12
- Technique
- T
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 6) Jopek et al., 2010
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
- 2012
- Shower group
- 00000
- Peak solar longitude
- 47 °
- Radiant right ascension
- 339.1 °
- Radiant declination
- -0.5 °
- Right ascension drift
- 0.64 °/day
- Declination drift
- 0.33 °/day
- Geocentric speed
- 67.4 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
- Not reported
- Technique
- T
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 7) Molau et al., 2013
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
- 2001/12
- Shower group
- 00000
- Peak solar longitude
- 47 °
- Radiant right ascension
- 338.9 °
- Radiant declination
- -0.6 °
- Right ascension drift
- 0.62 °/day
- Declination drift
- 0.31 °/day
- Geocentric speed
- 65.4 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
- 1,600
- Technique
- T
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 8) Molau and Kerr, 2014
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)
Parameter set 8
- MDC status code
- 1
- MDC status
- single established shower, group
- Activity
- annual
- Shower group
- 00000
- Peak solar longitude
- 46 °
- Radiant right ascension
- 338.1 °
- Radiant declination
- -0.8 °
- Right ascension drift
- 0.92 °/day
- Declination drift
- 0.37 °/day
- Geocentric speed
- 65.7 km/s
- Semimajor axis
- 7.41 AU
- Perihelion distance
- 0.587 AU
- Eccentricity
- 0.955
- Argument of perihelion
- 98.4 °
- Ascending node
- 46.2 °
- Inclination
- 163.6 °
- Observed members
- 936
- Technique
- T
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 9) Jenniskens et al., 2016, Icarus, 266, 331
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)