Free Access

Table 3.

Radiant positions, speeds, and orbital elements of Perseid meteors found in 5 studies compared with median values computed in this work and the orbit of the parent comet.

RA Dec Vg a q e i ω Node N
Jenniskens et al. 48.2 +58.1 59.1 9.57 0.949 0.950 113.1 150.4 139.3 4367
SonotaCo 47.2 +57.8 58.7 3524
Jopek et al. 47.3 +58.2 59.0 0.948 0.951 112.7 150.3 139.4 33
DMSa 48.3 +58.0 59.38 71.4 0.953 113.22 151.3 140.19 87
Kresák & Poruban 46.8 +57.7 59.49 24.0 0.949 0.960 113.0 150.4 139.7

This study 46.84 +58.08 59.58 2.69 0.963 0.953 113.5 153.8 139.77 71
(median error) 0.72 0.21 0.88 3.09 0.01 0.06 0.8 2.8 5 × 10−5

109P (parent comet) 45.8 +57.7 59.41 26.092 0.960 0.963 113.45 152.98 139.38

Notes. Increments of 0.86 and 0.51 have been added to the median radiant position in RA and Dec to account for radiant shift (Jenniskens 2006) to the location predicted for 13 August at 7:45 UT. Orbital elements in epoch J2000; symbols: a = semi-major axis (AU), q = perihelion distance (AU), e = eccentricity), i = inclination (), ω = argument of perihelion (), Node = ascending node (), N = number of observed meteors.

(a)

Dutch Meteor Society 2001: values for the parameters are given in Meteor Data Center IAU database (no reference given).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.