Activity of the Eta-Aquariid and Orionid meteor showers

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Table 2

Fit coefficients of the rising and falling slopes of η-Aquariids and Orionids average profiles presented in Figs. 4 and 5.

η-Aquariids

System	B_p	B_m	B_p2	B_m2	ZHR_m	ZHR_m2	(°)	(°)
29 MHz	0.111 ± 0.005	0.073 ± 0.003	0.122 ± 0.008	0.094 ± 0.007	76	66	44.5	46.8
38 MHz	0.126 ± 0.012	0.074 ± 0.006	0.164 ± 0.010	0.108 ± 0.006	51	49	44.7	45.3
VMN	0.129 ± 0.010	0.083 ± 0.006	0.180 ± 0.012	0.105 ± 0.006	70	60	44.3	47.3
VMDB	0.104 ± 0.014	0.065 ± 0.007	0.121 ± 0.011	0.106 ± 0.014	70	64	44.4	46.4

[1]	0.135 ± 0.003	0.078 ± 0.003	–	–	–	–	–	–

Orionids

System	B_p	B_m	B_p2	B_m2	ZHR_m	ZHR_m2	(°)	(°)

29 MHz	0.078 ± 0.009	0.069 ± 0.007	0.106 ± 0.008	0.103 ± 0.009	33	31	207.3	209.7
38 MHz	0.215 ± 0.047	0.118 ± 0.024	0.349 ± 0.043	0.233 ± 0.032	35	32	208.2	210.3
VMN	0.073 ± 0.008	0.054 ± 0.006	0.128 ± 0.011	0.095 ± 0.009	35	32	207.7	210.0
VMDB	0.073 ± 0.022	0.080 ± 0.023	0.120 ± 0.027	0.168 ± 0.044	40	33	207.7	210.5

[2]	0.122	0.098	–	–	–	–	–	–
[3]	0.140	0.140	–	–	–	–	–	–

Notes. Each estimate is followed by the fit formal uncertainty. The parameters B_p2 and B_m2 are adaptations of Eq. (2)’s B_p and B_m coefficients for profiles containing a dip or a plateau. The modeled maximum ZHR (ZHR_m, ZHR_m2) and the solar longitude endpoints of the plateau () are provided for information. [1]: η-Aquariids coefficients provided by Campbell-Brown & Brown (2015). [2,3]: Orionids coefficients determined by Jenniskens (1994) from Northern [2]and Southern [3] Hemisphere observations.

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