IAU 346 · XHE
x Herculids
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.
3 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
- 2009
- Shower group
- 00000
- Peak solar longitude
- 352 °
- Radiant right ascension
- 254 °
- Radiant declination
- 48 °
- Right ascension drift
- Not reported
- Declination drift
- Not reported
- Geocentric speed
- 36 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
- 161
- Technique
- T
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 1) Molau and Kac, 2009
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
- 350 °
- Radiant right ascension
- 253 °
- Radiant declination
- 49.2 °
- Right ascension drift
- 0.48 °/day
- Declination drift
- -0.1 °/day
- Geocentric speed
- 35.2 km/s
- Semimajor axis
- 2.99 AU
- Perihelion distance
- 0.975 AU
- Eccentricity
- 0.673
- Argument of perihelion
- 196.7 °
- Ascending node
- 350 °
- Inclination
- 59.8 °
- Observed members
- 5
- Technique
- T
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 2) Jenniskens et al., 2016, Icarus, 266, 331
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
- 351.88 °
- Radiant right ascension
- 253.5 °
- Radiant declination
- 48.94 °
- Right ascension drift
- -1.2 °/day
- Declination drift
- 0.38 °/day
- Geocentric speed
- 35.82 km/s
- Semimajor axis
- 3.47 AU
- Perihelion distance
- 0.98 AU
- Eccentricity
- 0.72
- Argument of perihelion
- 196.75 °
- Ascending node
- 351.88 °
- Inclination
- 60.4 °
- Observed members
- 15
- Technique
- T
- Submitted on
- 2021.08.16
- Reported parent body
- Not reported
Reference: 1) SonotaCo et al., 2021, WGN, 49, 76
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)