Both encounters with material from comet 15P/Finlay have been confirmed, giving birth to a new Arids (ARD #1130) meteor shower. Preliminary reports indicate that CAMS cameras located in the Southern Hemisphere detected activity from both the 1995 material (late September) [1, 2] and the 2014/15 returns (October 6/7) [3, 4] (Figure 1).
The September activity was weak and faint but enough activity was observed from CAMS in New-Zealand and Chile to provide an accurate radiant location.According to first analysis, 1995 material originated from a radiant located at R.A. ~ 263°, Dec. ~ -58°, with an geocentric entry velocity around 11 km/s.
The second encounter on October 6/7 was stronger with maximum ZHR’s as high as 80 during the peak, around 1h UT on Oct 7, using both radio (Figure 2) and visual data. A visual observer in Chile, under cloudy skies, reported 35 meteors from Ara during 62 minutes of viewing on October 7th. Also observing under poor conditions, Tim Cooper in South Africa only reported two meteors during two hours of viewing, but also added that “both very slow, noticeably orange, and sparkling appearance.” [5] He may have missed others as most of the Arids were reported as faint.
The Earth may have future encounters with debris from comet 15P/Finlay and hopefully observers in the Southern Hemisphere can enjoy more displays from this source.
References
[1] CBET n°5046
[2] Jenniskens, Peter, 2021. First detection of the Arid (ARD, #1130) meteor shower from comet 15P/Finlay. MeteorNews
[3] Vaubaillon, Jérémie, 2021. “Arids 2021”. The birth of a new meteor shower. IMCCE website.
[4] Jenniskens, Dr. Peter, 2021. A second Arid shower outburst in 2021. Meteor News
[5] Cooper Tim; Personal Communication, 6 October 2021
One comment
Hi Bob
I just receive from Claudio Martinez in Argentina via AWB (Astrronomers Wohout Boarders) the same confimation :
With a team of observers from Argentina, and with the support of Diego Janches, NASA physicist, we confirmed the presence of the new meteror shower associated with Comet 15 / Finlay.
We have worked visually, with reflex cameras and highly sensitive security cameras adapted for the night sky.
We detected a total of about 130 shooting stars associated with the Arid meteor shower, in the constellation Ara.
8 observers participated, from 5 provinces.
He post photos and a preliminar heat map with a starmap as well in the following link :
https://my.astronomerswithoutborders.org/communities/community-home/digestviewer/viewthread?MessageKey=8f4bedde-12d7-4ec6-afef-d20bab824e4a&CommunityKey=90890bc4-f7f7-43c4-9835-2c6da922974b&tab=digestviewer#bm8f4bedde-12d7-4ec6-afef-d20bab824e4a
Kind regards
Michel