IAU 16 · HYD
sigma Hydrids
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.
4 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
- 265.5 °
- Radiant right ascension
- 131.9 °
- Radiant declination
- 0.2 °
- Right ascension drift
- 0.72 °/day
- Declination drift
- -0.21 °/day
- Geocentric speed
- 58 km/s
- Semimajor axis
- 12.3 AU
- Perihelion distance
- 0.224 AU
- Eccentricity
- Not reported
- Argument of perihelion
- 124 °
- Ascending node
- 84.8 °
- Inclination
- 124.9 °
- Observed members
- 18
- Technique
- Not reported
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 1) Jenniskens, 2006
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
- 259.1 °
- Radiant right ascension
- 127.1 °
- Radiant declination
- 1.8 °
- Right ascension drift
- Not reported
- Declination drift
- Not reported
- Geocentric speed
- 58 km/s
- Semimajor axis
- Not reported
- Perihelion distance
- 0.237 AU
- Eccentricity
- 0.978
- Argument of perihelion
- 122.5 °
- Ascending node
- 79.1 °
- Inclination
- 126.5 °
- Observed members
- 5
- Technique
- P
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 2) Jopek et al., 2003
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
- 2007/08
- Shower group
- 00000
- Peak solar longitude
- 252.9 °
- Radiant right ascension
- 123.2 °
- Radiant declination
- 3 °
- Right ascension drift
- 3 °/day
- Declination drift
- -0.12 °/day
- Geocentric speed
- 59 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
- 699
- Technique
- T
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 3) SonotaCo, 2009
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
- 266 °
- Radiant right ascension
- 134.4 °
- Radiant declination
- -0.1 °
- Right ascension drift
- 0.92 °/day
- Declination drift
- -0.28 °/day
- Geocentric speed
- 58.9 km/s
- Semimajor axis
- 9.08 AU
- Perihelion distance
- 0.257 AU
- Eccentricity
- 0.985
- Argument of perihelion
- 119.5 °
- Ascending node
- 76.5 °
- Inclination
- 128.7 °
- Observed members
- 528
- Technique
- T
- Submitted on
- SD
- Reported parent body
- Not reported
Reference: 4) Jenniskens et al., 2016, Icarus, 266, 331
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)