Results of Daytime Arietids/ζ-Perseids
Since Daytime Arietids and ζ-Perseids show ctivities in the same period, it is difficult to separate them. In this research, therefore, try to estimate two compornents. Their activities show the strongest activity level in all daytime meteor showers.
Results of Daytime Arietids/ζ-Perseids every year
| Year | Source | Result |
|---|---|---|
| 2020 | WorldWide | Higher activity level around λ⊙=84°-88° and around λ⊙=75° |
| 2019 | WorldWide | Activity level was as same as annual year. |
| 2018 | WorldWide | Although esitmated profile was same as annual, λ⊙=79°-81° was stronger. |
| 2017 | WorldWide | Activity level was as same as annual year. |
| 2016 | – | – (not enough data in the world) |
| 2015 | WorldWide | Estimated peak time and activity level were same profile as annual year. |
| 2014 | WorldWide | Stronger activity. The peak time was same as annual year. |
| 2013 | WorldWide | Activity Level around λ⊙=79° was weaker than annual. |
| 2012 | WorldWide | Activity Level was stronger than annual year. |
| 2011 | WorldWide | The weaker activity than annual year. |
| 2010 | WorldWide | Activity level was as same as annual year. |
| 2009 | WorldWide | Strong activity. The clear activity was long time (λ⊙=76°-86°). |
| 2008 | WorldWide | Activity level was as same as annual year. (similar activity profile as 2006) |
| 2007 | WorldWide | The clear activity between λ⊙=78° and 84°. |
| 2006 | WorldWide | Activity level was as same as annual year. Around λ⊙=84°.0, was weak. |
| 2005 | – | – |
| 2004 | – | – |
| 2003 | – | – |
| 2002 | Misato | Two peaks were observed on 9th and 18th in June. |
| 2001 | Misato | Peak was observed around 9th June. Another peak in PM was observed. |
| 2000 | Misato | Peak was around 9th June. This clear activity was end of 16th. |
Long Term Activity Profile
Using Parameters of Daytime Arietids
| source | Solar Longitude | FWHM | Peak Activity Level |
|---|---|---|---|
| 2006-2020 | 78°.6 | -4°.6 / +9°.2 | 1.1 |
| 2006-2015 | 78°.6 | -4°.8 / +9°.4 | 1.2 |
| 2011-2019 | 79°.0 | -5°.0 / +8°.6 | 1.1 |
Using Parameters of ζ Perseids
| source | Solar Longitude | FWHM | Peak Activity Level |
|---|---|---|---|
| 2006-2020 | 78°.4 | -4°.2 / +9°.4 | 1.0 |
| 2006-2015 | 78°.4 | -4°.8 / +10°.2 | 1.0 |
| 2011-2019 | 78°.8 | -5°.0 / +10°.6 | 0.9 |
Discussion of separating between Daytime Arietids and ζ-Perseids
The following graph shows the separation of Long term activity profile(2006-2020). One is Comp-A(Orange-line). Another is Comp-B(Blue-line). Lotentz(red-line) is total activity profile (Comp-A + Comp-B).
Using Parameters of Daytime Arietids
| source | Compornet | Solar Longitude | FWHM | Peak Activity Level |
|---|---|---|---|---|
| 2006-2020 | Comp-A | λ⊙=78°.0 | -4°.0 / +6°.2 | 0.9 |
| Comp-B | λ⊙=84°.8 | -6°.2 / +3°.8 | 0.4 |
Using Parameters of ζ Perseids
| source | Compornet | Solar Longitude | FWHM | Peak Activity Level |
|---|---|---|---|---|
| 2006-2020 | Comp-A | λ⊙=77°.4 | -3°.4 / +7°.0 | 0.7 |
| Comp-B | λ⊙=84°.8 | -7°.8 / +4°.0 | 0.4 |
Disucussion Points
The discussion point is “What does two compornents mean ?". IMO publications says that they have similar maximum peak times and radiant points. It is difficult to separate these compornents.
In this project, provisionally, Comp-A using Arietids parmeters is as Daytime Arietids (171 ARI) and Comp-B using ζ Perseids parameters is Daytime ζ-Perseids (172 ZPE). However, we need to discuss about “What does two compornents mean ?".