The Solar Longitude (Abbrev: S.L., λ ☉) is 137 degrees, this value is the the date of maximum activity. It is measured as a degree with zero degree indicating spring equinox (roughly March 21st/22nd). 90 is the Summer Solstice, 180 is the Autumn Equinox and 270 is the Winter Solstice. This degree is independent of the calender. AMS .
The Eta Eridanids has a very low zenith hourly rate so don`t expect anything spectacular like you might see with the Geminids or Perseids. The latter of the two occurs at roughly the same time. They are quite swift at a speed of about 65km/s. Although possible of up to 6 per hour, its more likely that its only one. Ref: IMO
Although attributed to the Chacornac comet, it could also be attributed to Comet Pons-Gambart but the former is more likely to be the source. It is a relatively newly discovered meteor shower compared to other meteor shower. Pons-Gambart return has only be recorded in 1827, it is considered to be a lost comet. Chacornac is a long time period comet whereas Pons-Gambart is about 65 years. Ref: Harvard
The source of the meteor shower is C/1852 K1 (Chacornac)?. The closest star to the radiant point of the meteor shower is Azha. The coordinates can also be determined by the Right Ascension (43.7) and the Declination (-11.9).
The Zenith Hourly Rate or how many you expect to see during the hour is 6. The ZHR can radically increase if the comet or associated object is close by. The speed/velocity of the Meteor Shower particles is 65 km/s.
|Associated Asteroid||C/1852 K1 (Chacornac)?|
|Closest Star to Radiant Point||Azha|
|Max Activity Date||09 Aug|
|Activity Period||3 Aug- 14 Aug|
|Solar Longitude / λ ☉||137 °|
|Zenith Hourly Rate||6|