IAU 508 · TPI

theta Piscids

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.

2 parameter sets returned for this shower. List-page filters do not hide sets here.

Parameter set 0

MDC status code: -2
MDC status: shower removed from the MDC lists, but in the future, it can return to the database
Activity: 2012
Shower group: 00000
Peak solar longitude: 147 °
Radiant right ascension: 352 °
Radiant declination: 4.1 °
Right ascension drift: 0.78 °/day
Declination drift: 0.36 °/day
Geocentric speed: 39 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: 4,500
Technique: T
Submitted on: SD
Reported parent body: Unknown

Reference: 1) Molau et al., 2012

Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)

Parameter set 1

MDC status code: -2
MDC status: shower removed from the MDC lists, but in the future, it can return to the database
Activity: annual
Shower group: 00000
Peak solar longitude: 146.5 °
Radiant right ascension: 351.5 °
Radiant declination: 4 °
Right ascension drift: Not reported
Declination drift: Not reported
Geocentric speed: 38.1 km/s
Semimajor axis: Not reported
Perihelion distance: 0.102 AU
Eccentricity: 0.951
Argument of perihelion: 328 °
Ascending node: 146.5 °
Inclination: 21.1 °
Observed members: 143
Technique: T
Submitted on: SD
Reported parent body: Unknown

Reference: 2) Kornos et al., 2014

Source: IAU Meteor Data Center (Jenniskens et al. 2020; Hajdukova & Rudawska)