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(meteorobs) Late April / Early May Obs, inc. Eta Aqu. from Melbourne, Aust.
Hi to everyone.
Its been quite a while since I posted last on the list. I've been
observing over a 4 week holiday I've been on and have been watching and
plotting some minor and major streams. This observing run started on the
night of the 25th and 26th of April with the Pi Puppids and, except one
night that was cloudy, has continued for the last 11 nights.
The observations were made from various locations across the state
including our astronomical societies' observing property in outback
Victoria, Australia where the observations of the Eta Aquarid peak were
conducted. The Eta Aquarid observations made on the nights the 1/2 and 2/3
or May were made at a national park on the southern cost of Victoria called
Wilson's Promontory. The sky from there is exceptionally dark and the
observed rates were great.
On the Eta Aquarids, we were able to get a reasonable night on the maximum,
and a very clear night, last night for some great rates and a top ZHR. One
of the most noted features of the Etas this year was the high proportion of
meteors that had persistent trains. I have figures after the observations
below.
A key is provided just below to help with stream designations for the minor
streams that were observed, (majors also listed).
Streams: PPU - Pi Puppids
GMU - Gamma Muscids
VIR - Virginids
TSA - Tau Sagittarids
ETA - Eta Aquarids
Date Time (UT) LM Teff
25/6-4 11.25-12.25 +6.50 0.96 0-PPU 0-VIR 11-TOT
25/6-4 12.25-13.25 +6.15 0.96 1-PPU 1-VIR 8-TOT
25/6-4 13.25-14.25 +6.00 0.96 0-PPU 0-VIR 9-TOT
26/7-4 10.10-11.10 +6.10 0.91 0-PPU 0-VIR 2-GMU 8-TOT
26/7-4 11.10-12.10 +6.15 0.91 1-PPU 2-VIR 0-GMU 8-TOT
26/7-4 12.10-13.10 +6.25 0.92 0-PPU 1-VIR 0-GMU 7-TOT
27/8-4 13-05-14.05 +6.20 0.96 0-PPU 0-VIR 0-GMU 4-TOT
27/8-4 14.05-15.05 +6.30 0.88 1-PPU 1-VIR 2-GMU 11-TOT
27/8-4 15.25-16.25 +6.10 0.88 0-PPU 0-VIR 1-GMU 11-TOT
27/8-4 16.30-17.30 +5.60 0.99 0-VIR
0-ETA 6-TOT
27/8-4 17.30-18.30 +5.60 0.98 0-VIR
1-ETA 12-TOT
28/9-4 14.15-15.15 +6.50 0.98 0-TSA 0-VIR 0-GMU 10-TOT
28/9-4 15.25-16.25 +6.50 0.98 1-TSA 1-VIR 0-GMU 16-TOT
28/9-4 16.50-17.50 +6.20 0.98 1-TSA
0-ETA 17-TOT
28/9-4 18.10-19.10 +6.10 0.98 2-TSA 1-ETA 13-TOT
29/30-4 12.40-13.40 +6.50 0.98 2-VIR 1-GMU
11-TOT
29/30-4 13.40-14.40 +6.50 0.98 0-TSA 3-VIR 0-GMU
12-TOT
29/30-4 14.55-15.55 +6.50 0.98 0-TSA 0-VIR 2-GMU
1-ETA 14-TOT
29/30-4 16.10-17.10 +6.40 0.97 1-TSA
2-ETA 16-TOT
30/4-1/5 12.10-13.10 +6.30 0.90 0-TSA 1-VIR 0-GMU 10-TOT
30/4-1/5 13.10-14.10 +6.30 0.87 1-TSA 2-VIR 0-GMU 12-TOT
1/2-5 10-50-11-50 +6.80 0.98 0-VIR 0-GMU 13-TOT
1/2-5 12.10-13.10 +6.80 0.98 2-VIR 13-TOT
1/2-5 13.30-14.30 +6.80 0.98 2-VIR 13-TOT
1/2-5 14.55-15.55 +6.70 0.97 1-TSA 2-VIR
0-ETA 18-TOT
1/2-5 16.15-17.15 +6.75 0.96 2-TSA 1-VIR
3-ETA 23-TOT
1/2-5 17-20-18.20 +6.80 0.95 1-TSA
13-ETA 32-TOT
1/2-5 18.20-18.50 +6.85 0.48 0-TSA
8-ETA 15-TOT
2/3-5 11.20-12.20 +6.80 0.98 3-VIR 1-GMU
13-TOT
2/3-5 12.40-13.40 +6.80 0.99 1-VIR 6-TOT
2/3-5 14.35-15.35 +6.80 0.96 0-TSA 6-VIR 23-TOT
2/3-5 15.45-16.15 +6.85 0.49 0-TSA 0-VIR 7-TOT
2/3-5 16.25-17.25 +6.80 0.94 1-TSA 3-VIR
11-ETA 38-TOT
2/3-5 17-25-18.25 +6.85 0.93 1-TSA
15-ETA 42-TOT
4/5-5 10.55-11.25 +6.70 0.49 0-VIR 5-TOT
4/5-5 14.55-15.25 +6.60 0.48 6-VIR 13-TOT
5/6-5 15.05-16.05 +6.70 0.99 0-VIR
0-ETA 9-TOT
5/6-5 17.03-18.03 +6.70 0.96
16-ETA 22-TOT
5/6-5 18.55-20.00 +6.50 1.01
41-ETA 65-TOT
6/7-5 12.10-13.10 +6.75 0.98 4-VIR
14-TOT
6/7-5 13.30-14.30 +6.75 0.99 1-VIR
13-TOT
6/7-5 14.40-15.40 +6.75 0.98 2-VIR 16-TOT
6/7-5 17.05-17.20 +6.70 0.24 1-ETA 3-TOT
6/7-5 17.50-18.50 +6.70 0.95 29-ETA 48-TOT
6/7-5 18-50-19.50 +6.70 0.94
45-ETA 57-TOT
6/7-5 19.50-20.00 +5.70 0.15
5-TOT 8-TOT
As you can see, a lot of observing has been done. The Eta Aquarid results
are great. I am still to do a Magnitude and Train statistical break. This
will be posted in the next few days along with a zhr calc for all the hours
that I have done. Preliminary ZHR's for the night of the maximum, and
surprisingly, the night after the maximum are around 60 to 80. This is on
the higher side of normal. A very high percentage of trains were also
noted, more on this in the next mail to.
The weather looks good here tonight, so I may get out and do some more Eta
Aqu observing if it stays good.
Bye for Now, Adam Marsh.
-----------------------------------------------------------
Adam R Marsh (MARAD)
Assistant Director - ASV Meteor Section, Victoria, Australia
Coordinator EAMN - Eastern Australian Meteor Network.
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E-Mail - armarsh@jeack.com.au
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