δ-Aquarids
δ-Aquarids is observed from the end of July to August. The radiant structure of Aquarids is very complex by The Nippon Meteor Society(NMS). Aquarids has four meteor showers. Southern δ-Aquarids(IMO-Code:SDA) is one of them and the highest activity. Other showers are Northern δ-Aquarids(NDA), Northern ι-Aquarids and Southern ι-Aquarids.
In Radio Meteor Observation, this activity is caught 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 observation with using 28MHz is also able to catch this activity clearly.
Information of δ-Aquarids
| Name | Southern δ-Aquarids |
|---|---|
| IMO Code | SDA |
| Solar Longitude(MAX) | 125° |
| Radiant | α = 339° / δ = -16° |
| feature | ZHR(max):20, r=3.2, V∞:41km/s |
| Parant Comet | 96P/Machholz 1 |
| Reference | The International Meteor Organization |
Condition of observation in maximum night (2010 - 2015)
| SDA | MAX.Time(UT) | moon (Jul.28 00h) |
|---|---|---|
| 125 (IMO) | ||
| 2010 | Jul.28 | 16 |
| 2011 | Jul.28 | 27 |
| 2012 | Jul.28 | 9 |
| 2013 | Jul.28 | 20 |
| 2014 | Jul.28 | 1 |
| 2015 | Jul.28 | 12 |
* Since Radio Meteor Observation does not influence the moon, it is possible to observe during activity period(Jul.20 - Aug.5).
Results
Result of δ-Aquarids is recorded.(mainly Radio Meteor Observation)
Result of δ-Aquarids