Table 3
Mean geophysical parameters of the real meteor shower related to the stream of comet C/1975 T2.
| Mod. | Dlim | ⟨ λ⊙ ⟩ | λ⊙,min – λ⊙,max | ⟨ α ⟩ | ⟨ δ ⟩ | ⟨Vg ⟩ | ⟨Vh ⟩ | N | ⟨Dmj ⟩ |
|---|---|---|---|---|---|---|---|---|---|
| (deg) | (deg) | (deg) | (deg) | (km s−1) | (km s−1) | ||||
| C-1 | 0.13 | 214.6 ± 2.4 | 211.5–220.5 | 156.1 ± 3.2 | 48.0 ± 1.9 | 61.6 ± 1.2 | 41.8 ± 0.6 | 9 | 0.088 ± 0.018 |
| C-2 | 0.20 | 218.0 ± 4.0 | 211.5–225.3 | 158.1 ± 4.3 | 45.0 ± 3.0 | 61.9 ± 1.3 | 41.2 ± 0.8 | 26 | 0.143 ± 0.028 |
| S-1 | 0.08 | 214.4 ± 1.1 | 211.5–225.3 | 157.5 ± 1.7 | 49.7 ± 1.1 | 60.8 ± 0.7 | 42.0 ± 0.4 | 21 | 0.057 ± 0.016 |
| S-2 | 0.11 | 215.0 ± 1.6 | 211.5–225.3 | 158.4 ± 2.2 | 49.3 ± 1.3 | 60.7 ± 0.8 | 41.9 ± 0.5 | 33 | 0.071 ± 0.021 |
| E-1 | 0.10 | 214.6 ± 1.3 | 211.4–225.3 | 157.7 ± 1.5 | 49.4 ± 0.8 | 60.8 ± 0.8 | 41.9 ± 0.4 | 19 | 0.058 ± 0.020 |
| E-2 | 0.15 | 215.0 ± 2.3 | 209.7–225.3 | 157.7 ± 2.7 | 49.0 ± 1.4 | 60.5 ± 0.9 | 41.4 ± 0.7 | 36 | 0.092 ± 0.034 |
| Andreić et al. (2013) | 215.0 | 157.2 | 49.4 | 60.3 | 29 | ||||
| Rudawska et al. (2015) | 215.1 ± 3.1 | 157.3 ± 4.3 | 49.0 ± 2.4 | 59.9 ± 1.2 | 82 | ||||
| Jenniskens et al. (2016a) | 214.0 | 157.8 ± 1.1 | 50.2 ± 0.4 | 60.9 | 4 | ||||
| Jenniskens et al. (2018) | 214.6 | 158.4 | 49.5 | 60.7 | 33 | ||||
Notes.Two modifications (for two threshold values of the Southworth-Hawkins D-discriminant, Dlim) of the shower were separated from each of three databases, C, S, and E. In addition, we also give the mean parameters of the showers in the IAU MDC list as published by various authors, those by Rudawska et al. (2015) included. Further symbols used as follows: ⟨λ⊙⟩ – mean solarlongitude; λ⊙,min and λ⊙,max – period of shower activity in term of minimum and maximum solar longitude of shower occurrence; ⟨α⟩ and ⟨δ⟩ – mean equatorial coordinates of geocentric radiant; ⟨Vg ⟩ and ⟨Vh ⟩ – mean geocentric and heliocentric velocities; N – number of meteors in given modification; and ⟨Dmj ⟩ – the mean value of the Southworth-Hawkins D-discriminant characterizing the dispersion of meteor orbits in given modification (see Sect. 4.1).
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