δ-Aquariids Meteor Shower (Peak Time and Condition)
δ-Aquariids is came at the end of July to August. The radiant structure of Aquariids is very complex in visual. Aquariids has four meteor showers. Southern δ-Aquariids(IMO-Code:SDA) is one of them and the strongest activity. Other showers are Northern δ-Aquariids(NDA), Northern ι-Aquariids and Southern ι-Aquariids.
In Radio Meteor Observation, δ-Aquariids is caught very clearly from 20th July to 5th August. The number of total meteor echoes with Radio Meteor Observation is higher than Perseid activity. It seems the condition of the geocentric velocity is very good for Radio Meteor Observation. The maximum both visual and radio occurs at λ⊙=125°.
Information of δ-Aquariids
| Name (code) | Southern δ-Aquariids (005 SDA) | |
|---|---|---|
| Active | Visual(IMO) | Jul.12th – Aug.23th |
| Radio(IPRMO) | Jul.19th – Aug.10th | |
| Maximum | Visual(IMO) | λ⊙=125° |
| Radio(IPRMO) | λ⊙=125°.0 | |
| Radiant | α = 339° / δ = -16° | |
| feature | ZHR(max):15, r=3.2, V∞:41km/s Radio) Maximum Activity Level=3.0 FWHM:-2°.8/+5°.3 |
|
| Parant Comet | 96P/Machholz 1 | |
Reference and Useful Links
– 2021 Meteor Shower Calendar (International Meteor Organization)
– A new Working List of meteor showers (Rainer Arlt et al), WGN 34:3(2006)
– Meteor Shower Workbook 2014 (J.Rendtel) ? International Meteor Organization (2014)
– Major and Daytime Meteor Showers using Radio Meteor Observation in the World covering the period 2001-2016(H.Ogawa and C.Steyaert), WGN 45:4(2017)
– The American Meteor Society (AMS)
Conditions in the future (2021-2025) for Radio Meteor Observations
Below are observig conditions for radio meteor observers in 2021, 2022, 2023, 2024 and 2025. This is listed for radio observers (NOT for visual observers). You can see visual observing conditions as following AMS site.
Conditions for Visual Observers (by AMS)
Conditions in North America
| Year | Peak Time and Condition (λ⊙=125°) | Comments for Radio Obs. | ||||
|---|---|---|---|---|---|---|
| AST(ADT) | EST(EDT) | CST(CDT) | MST(MDT) | PST(PDT) | ||
| Year | Peak Time and Condition (λ⊙=125°) |
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| 2021 |
Jul.28th
 δ-Aquariids has broad maximum activity. The high activity continues for a few days. Besids, δ Aquariids gifts a lot of meteor echoes for radio observers. Therefore it is possible to observe under best condition every year. The maximum occuers around Jul.28-30.
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| 2022 | ||||||
| 2023 | ||||||
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| 2025 | ||||||
Conditions in Other region
| Year | Peak Time and Condition (λ⊙=125°) | Comments for Radio Obs. | |||
|---|---|---|---|---|---|
| GMT(UK) | CET(Italy) | IST(India) | JST(Japan) | ||
| Year | Peak Time and Condition (λ⊙=125°) |
||||
| 2021 |
Jul.28th
δ-Aquariids has broad maximum activity. The high activity continues for a few days. Besids, δ Aquariids gifts a lot of meteor echoes for radio observers. Therefore it is possible to observe under best condition every year. The maximum occuers around Jul.28-30.
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| 2022 | |||||
| 2023 | |||||
| 2024 | |||||
| 2025 | |||||
Results of δ-Aquariids by Radio Meteor Observations
Result of δ-Aquariids is recorded by worldwide radio meteor observers.
Result of δ-Aquariids