Jupiter-family comet 15P/Finlay has been reportedly quiet in activity for over a century but has harbored two outbursts during its 2014/2015 perihelion passage .
Here we present an analysis of these two outbursts using a set of cometary observations .
The outbursts took place between 2014 Dec. 15.4–16.0 UT and 2015 Jan. 15.5–16.0 UT as constrained by ground-based and spacecraft observations .
We find a characteristic ejection speed of V _ { 0 } = 300 to 650 \mathrm { m \cdot s ^ { -1 } } for the ejecta of the first outburst and V _ { 0 } = 550 to 750 \mathrm { m \cdot s ^ { -1 } } for that of the second outburst using a Monte Carlo dust model .
The mass of the ejecta is calculated to be M _ { \mathrm { d } } = 2 to 3 \times 10 ^ { 5 } \mathrm { kg } for the first outburst and M _ { \mathrm { d } } = 4 to 5 \times 10 ^ { 5 } \mathrm { kg } for the second outburst , corresponds to less than 10 ^ { -7 } of the nucleus mass .
The specific energy of the two outbursts is found to be 0.3 to 2 \times 10 ^ { 5 } \mathrm { J \cdot kg ^ { -1 } } .
We also revisit the long-standing puzzle of the non-detection of the hypothetical Finlayid meteor shower by performing a cued search using the 13-year data from the Canadian Meteor Orbit Radar , which does not reveal any positives .
The Earth will pass the 2014/2015 outburst ejecta around 2021 Oct. 6 at 22 h UT to Oct. 7 at 1 h UT , with a chance for some significant meteor activity in the radio range , which may provide further clues to the Finlayid puzzle .
A southerly radiant in the constellation of Ara will favor the observers in the southern tip of Africa .