IAU 8 · ORI
Orionids
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.
7 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
- 208.6 °
- Radiant right ascension
- 95.4 °
- Radiant declination
- 15.9 °
- Right ascension drift
- 0.7 °/day
- Declination drift
- 0.11 °/day
- Geocentric speed
- 66.2 km/s
- Semimajor axis
- 9.68 AU
- Perihelion distance
- 0.571 AU
- Eccentricity
- Not reported
- Argument of perihelion
- 82.8 °
- Ascending node
- 28.6 °
- Inclination
- 164.2 °
- Observed members
- Not reported
- Technique
- Not reported
- Submitted on
- SD
- Reported parent body
- 1P/Halley
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
- 208.7 °
- Radiant right ascension
- 94.7 °
- Radiant declination
- 15.9 °
- Right ascension drift
- 0.65 °/day
- Declination drift
- 0.11 °/day
- Geocentric speed
- 66.53 km/s
- Semimajor axis
- 18 AU
- Perihelion distance
- 0.578 AU
- Eccentricity
- 0.968
- Argument of perihelion
- 81.5 °
- Ascending node
- 28.7 °
- Inclination
- 164.3 °
- Observed members
- 30
- Technique
- P
- Submitted on
- SD
- Reported parent body
- 1P/Halley
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
- 209.8 °
- Radiant right ascension
- 96.3 °
- Radiant declination
- 16.1 °
- Right ascension drift
- Not reported
- Declination drift
- Not reported
- Geocentric speed
- 66.4 km/s
- Semimajor axis
- Not reported
- Perihelion distance
- 0.565 AU
- Eccentricity
- 0.963
- Argument of perihelion
- 83.2 °
- Ascending node
- 29.8 °
- Inclination
- 164.6 °
- Observed members
- 19
- Technique
- P
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 3) Jopek et al., 2003
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
- 2002/08
- Shower group
- 00000
- Peak solar longitude
- 207.5 °
- Radiant right ascension
- 94.7 °
- Radiant declination
- 15.5 °
- Right ascension drift
- 0.78 °/day
- Declination drift
- 0.03 °/day
- Geocentric speed
- 66.4 km/s
- Semimajor axis
- 9.71 AU
- Perihelion distance
- 0.597 AU
- Eccentricity
- 0.9385
- Argument of perihelion
- 80.1 °
- Ascending node
- 27 °
- Inclination
- 163.6 °
- Observed members
- 1,297
- 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
- 207.9 °
- Radiant right ascension
- 95.5 °
- Radiant declination
- 15.5 °
- Right ascension drift
- 0.61 °/day
- Declination drift
- 0.01 °/day
- Geocentric speed
- 66.2 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
- 2,733
- 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
- 2002/08
- Shower group
- 00000
- Peak solar longitude
- 208 °
- Radiant right ascension
- 95.5 °
- Radiant declination
- 15.2 °
- Right ascension drift
- 0.78 °/day
- Declination drift
- 0.02 °/day
- Geocentric speed
- 65.4 km/s
- Semimajor axis
- 5.47 AU
- Perihelion distance
- 0.5746 AU
- Eccentricity
- 0.895
- Argument of perihelion
- 83.98 °
- Ascending node
- 28 °
- Inclination
- 162.8 °
- Observed members
- 2,536
- Technique
- R
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 6) Brown 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
- annual
- Shower group
- 00000
- Peak solar longitude
- 209 °
- Radiant right ascension
- 95.9 °
- Radiant declination
- 15.7 °
- Right ascension drift
- 1.03 °/day
- Declination drift
- -0.05 °/day
- Geocentric speed
- 66.3 km/s
- Semimajor axis
- 6.87 AU
- Perihelion distance
- 0.578 AU
- Eccentricity
- 0.944
- Argument of perihelion
- 82.2 °
- Ascending node
- 28.3 °
- Inclination
- 163.9 °
- Observed members
- 3,024
- Technique
- T
- Submitted on
- SD
- Reported parent body
- 1P/Halley
Reference: 7) Jenniskens et al., 2016, Icarus, 266, 331
Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)