Table D.2
Compilation of main peak times and ZHRs of the Orionids meteor shower between 1982 and 2019, deduced from visual observations.
| Year | SL main peak | ZHR main peak | Duration/FWHM | r at maximum | Source |
|---|---|---|---|---|---|
| (°, J2000) | |||||
| 1982, 1984–1987 | 207.30 | ~18 | – | 2.5 | [1]F |
| 1985 | 207.69 | 23.8 ± 0.9 | 2.25 | [2] | |
| 1990 | 207.35 | 15.6 ± 0.8 | – | 2.84 ± 0.13 | [3] |
| 1990 | 209.7 | 16 ± 1.9 | – | 2.44 ± 0.19 | [3] |
| 1993 | 204.82 | 31.1 ± 0.09 | 204.74°−206.14° L⊙ | 1.95 ± 0.05 | [4] |
| 2001 | 207.9 | 30 ± 4 | 206.9°−210.8° L⊙ | 2.59 | [5] |
| 2002 | – | 18 ± 4 | – | 2.59 | [5] |
| 2003 | 208.6 | 31 ± 16 | – | 2.59 | [5] |
| 2004 | 209.4 | 40 ± 7 | 207.3°−212.1° L⊙ | 2.59 | [5] |
| 2005 | 208.7 | 67 ± 24 | – | 2.59 | [5] |
| 2006 | 208.2 | 72 ± 8 | 206.8°–211.0° L⊙ | 2.59 | [5] |
| 2007 | 208.450 | 80.5 ± 4.7 | 207.12°–209.2° L⊙ | 2.11 ± 0.07 | [6] |
| 2007 | 208.5 | 80 ± 6 | 207.0°–209.5° L⊙ | 2.59 | [5] |
| 2008 | 207.8–207.9 | 60 ± 10 | 206.1°–209.6° L⊙ | 2.59 | [5] |
| 2009 | 207.4–209.4 | 50 ± 6 | 206.1°–211.5° L⊙ | 2.59 | [5] |
| 2010 | 208.5 | 60 ± 10 | 206.0°–210.6° L⊙ | 2.59 | [5] |
| 2011 | 208.6 | 45 ± 8 | 207.0°–209.5° L⊙ | 2.59 | [5] |
| 2012 | 208.3 | 27 ± 4 | 205.4°–211.5° L⊙ | 2.59 | [5] |
| 2013 | 208.4 | 27 ± 10 | – | 2.59 | [5] |
| 2014 | 208.4 | 21 ± 2 | 206.3°–209° L⊙ | 2.59 | [5] |
| 2015 | 207.7 | 21 ± 3 | 205.4°-211° L⊙ | 2.59 | [5] |
| 2016 | 208.7 | 19 ± 5 | – | 2.59 | [5] |
| 2017 | 207.5 | 28 ± 3 | 206.5°–211.0° L⊙ | 2.59 | [5] |
| 2017 | 208.9 | 27 ± 3 | 206.5°–211.0° L⊙ | 2.59 | [5] |
| 2018 | 207.3 | 25 ± 5 | – | 2.59 | [5] |
| 2019 | 209.0 | 25 ± 3 | 205.0°–211.0° L⊙ | 2.59 | [5] |
Notes. When available, the population index r at the peak and the Full Half Width Maximum (FWHM) are also provided. Values from works labeled “F” were extracted from the published ZHR profiles and not specified explicitly in the source text. Estimates determined in this work are detailed in Sect. 6.3.1.
References. [1] Porubcan et al. (1991), [2] Spalding (1987), [3] Koschack & Roggemans (1991), [4] Rendtel & Betlem (1993), [5] this work and [6] Arlt et al. (2008).
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