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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 (2011 - 2015)

SDA MAX.Time(UT) moon
(Jul.28 00h)
125 (IMO)
2011Jul.2827
2012Jul.289
2013Jul.2820
2014Jul.281
2015Jul.2812

* 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)
icon Result of δ-Aquarids