Back Δ-Aquàrids australs Catalan Jižní Delta Aquaridy Czech Juli-Aquariiden German Sudaj Delta Akvistidoj Esperanto Delta aquarides du Sud French דלתא אקוורידים דרומיים HE Südlech Delta-Aquariden LB Delta Akvaridai Lithuanian Południowe delta Akwarydy Polish Южные дельта-Аквариды Russian
| Southern Delta Aquariids (SDA) | |
|---|---|
| Parent body | 96P/Machholz[1] |
| Radiant | |
| Constellation | Aquarius |
| Right ascension | 23h 20m |
| Declination | −16° |
| Properties | |
| Occurs during | July 12 – August 23 |
| Date of peak | July 30 |
| Zenithal hourly rate | 16[1] |
The Southern Delta Aquariids[2] are a meteor shower visible from mid July to mid August each year with peak activity on 28 or 29 July. The comet of origin is not known with certainty. A suspected candidate is Comet 96P Machholz. Earlier, it was thought to have originated from the Marsden and Kracht Sungrazing comets.[1]
The Delta Aquariids get their name because their radiant appears to lie in the constellation Aquarius, near one of the constellation's brightest stars, Delta Aquarii. The name derives from the Latin possessive form "Aquarii", whereby the declension "-i" is replaced by "-ids" (hence Aquariids with two i's). There are two branches of the Delta Aquariid meteor shower, Southern and Northern. The Southern Delta Aquariids are considered a strong shower, with an average meteor observation rate of 15–20 per hour, and a peak zenithal hourly rate of 18. The average radiant is at RA=339°, DEC=−17°. The Northern Delta Aquariids are a weaker shower, peaking later in mid August, with an average peak rate of 10 meteors per hour and an average radiant of RA=340°, DEC=−2°.
- ^ a b c Jenniskens, Peter (2006). "The sunskirting streams: Arietids and δ-Aquariids". Meteor Showers and Their Parent Comets. Cambridge University Press. pp. 423–37. ISBN 978-0-521-85349-1.
- ^ "Meteor Shower Calendar | IMO | Page 2009". Retrieved 2022-09-27.