New year celebrations caught by the all sky camera.
Below are the daily and hourly meteor counts for December, the peaks for the Geminids and Ursids are clearly shown. Unfortunately Graves went off line between 20:00 on 13/12/17 and 08:00 on 14/12/17. The increase in activity on 31st is beginning of Quadrantids, which will be peaking on the 3/4 Jan.
Here is a comparison with December 2016, Graves went off line last December for most of the 29th Dec.
This final plot shows the daily meteor activity throughout 2017, the major showers are marked, for more information on meteor showers go to http://meteorshowersonline.com/
Happy New Year
below are the daily and hourly rates for meteors this month, average daily count of 48 and av hourly count of 2. No major showers,
Next month the Orionids peaking on 21st, the activity is already at 80+ counts with the Sextantids (daylight shower) and the Eta Cetids and October Cetids all active at the start of October.
September Meteors: Minor Activity
A little after the event, but has taken time downloading / checking data after my eclipse chasing.
The daily rate shows a peak on the 12th August, however checking out the hourly rate shows the maximum hourly rate occurred on the 13th August at during 7 – 8 am with a max of 30 meteors. The maximum activity on each day was concentrated in the pre dawn hours.
I noticed the odd perseid in the USA but being a lot further south the radiant was a lot lower in the sky, quite close to horizon, which made life difficult when dark spots were usually surrounded by trees! With early starts each day it wasn’t feasible to wait into the early hours.
Below is data on rest of showers during August, September offers only minor showers.
||August 14-September 12
Here is the July meteor data based upon radar backscatter from Graves. As commented by http://meteorshowersonline.com/july_radiants.html
“Although the July radiants do not individually produce strong rates, activity from the Aquarius and Capricornus regions in July and early August, as well as minor activity from other radiants, cause hourly rates to basically rise between the middle and end of July for observers in both the Northern and Southern Hemispheres. Therefore, clear, moonless nights can be quite enjoyable for anyone observing during late July. “
there is a definite increase in activity towards end of month, where we are also entering the Perseid stream ( July 23 – Aug 22nd) and there has been a noticeable increase in fireballs picked up by NASA all sky monitors ( see Spaceweather.com)
I have also combined last years daily counts with this years for comparison:
although the count rates vary, there is some mirroring of variation early in the month, but there appears to be an increase rather than decrease in activity during the latter stages of the month. Notice also the diurnal nature of activity, particularly during the second half of the month, where activity is very high during the early hours of the day ( see Hourly meteor rate) .This is a good pointer to observing the Perseids later this month, with peak activity from midnight , through the early hours of the 12-13 Aug, a waning Gibbous moon will be rising around midnight which might interfere with viewing, but it stays relatively low in the sky as the Perseid radiant climbs higher. The shower is active from July 23 till Aug 22nd with best views during the nights of the 11, 12 and 13 Aug. Definitely worth getting those all sky cameras we have made up and running to record shower activity.
below is the daily and hourly rates of meteor detection using Graves radar signal, no major showers this month, month started with continued high count from end of May, then varied with combination over various showers overlapping during month, possible Graves “down time ” early in the month, from morning of 2ndJune to morning 3rd June.
Happy new Year to one and all, have attached the daily and hourly meteor rates for December.
The Geminids peaked over the 13th/14th dec, with max activity at 04:00 on the 14th.The gradual increase in activity from the 8/9th due to activity from several other minor showers over the period 8th – 12th, the lack of any other activity accounting for the sharp cut off after the 14th. The Ursids peaked on the 22nd, slight increase on 18th possibly due to combination of Ursids and other minor shower.
No activity logged between 09:00 on 28th and 23:00 on 29th, consensus is that Graves was offline, maintenance possibly??.
A quiet end to the month, look out for the Quadrantids January 3th/4th, 11pm to early hours, luckily moon is not a problem.
below are plots of Geminid activity as picked up by reflected radar from Graves.
First Plot shows Daily activity from 1st Dec to 15th Dec, Geminids peaking over the 13th / 14th. The fall off of activity is also a lot greater than the build up.
Looking in detail at the hourly count over the period of the 12th -15th Dec, the peak activity occurred during the period from 12:00 on the 13th to approx. 12:00 on the 14th.
Next up are the Ursids, peaking Dec 22/23 with radiant in Ursa Minor, this comet shower is associated with comet 8P/Tuttle, the moon won’t be a problem, so lets hope for clear skies.