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NASA's Night Sky in April 2014
What's up for April 2014. The sky at night this month from NASA JPL.
Comet ISON and Meteor Counts in January 2014
Preliminary results from Belarus-Ukraine observers :
are consistent with the hypothesis that earth did pass through Comet ISON’s long tail in January 7-23, and that this caused a significant increase in meteor counts as detected by observers in Ukraine and Belarus.
To read early report (PS this is a work in progress : http://1drv.ms/1gWhvHW )
Period January 7-23
Year Average Count
2013 / 20
2014 / 80
Call to Action : If any others can summarize their own results this would be very helpful.
Minsk Team write :
Уважаемые коллеги Александр и Bill !
Остаётся просмотреть снимки на 2,5 олл-скай камерах :-)
11 - 13 января - явно вырисовывается радиант "спорадических" метеоров из
региона Leo,LMi, UMa, UMi, Cam, Lyn, Cnc.
Мы просмотрели снимки олл-скай камер в интервале времени 10 - 17 января 2014 года.
Иван М. Сергей показал график радионаблюдений метеорного фона за январь 2014 - там хорошо просматривается повышенная метеорная активность 08 - 24 января 2014. Прилагаю графики радионаблюдений за январь 2012 и январь 2013
Может нам поднять снимки и просмотреть ещё раз в интервале 06 - 26 января 2014 ?
Bill, может у Вас кто-нибудь тоже проведёт подобную работу - просмотры снимков олл-скай камер и радионаблюдения метеорного фона
Анастасия Кулаковская, Валентин Таболич, Анастасия Таболич.
Dear colleagues, Alexander and Bill!
It remains to view images on 2.5 all-sky cameras :-)
January 11-13 - clearly emerges radiant " sporadic " meteors from the region
Leo, LMi, UMa, UMi, Cam, Lyn, Cnc.
We viewed pictures of all- sky cameras in the time interval 10-17 January 2014.
Ivan Sergei M. schedule radio observations showed meteor background for January 2014 - there is clearly visible meteor activity increased 08 - January 24, 2014 . Attached chart for radio observations in January 2012 and January 2013
Maybe we should raise the pictures and see again in the range of 06 - 26 January 2014 ?
Bill, can you hold someone too similar work - views pictures all- sky cameras and radio observations of the meteor background?
Anastasia Kulakovskaya, Valentin Tabolich, Anastasia Tabolich.
Northern lights photographed by Andy Gray on Nov 27
Northern lights photographed by Andy Gray on Nov 27 @ Northumberland, UKFebruary 27, 2014
This was the night of the COMET ISON perihelion and sublimation event November 27th. The cosmic wind would carry particles in a cone shape away from far side of the sun. So it is just a coincidence? But then maybe the sublimation happened over many days even a couple of weeks (not a single explosion) and perhaps particles were projected earthwards.
See : https://twitter.com/search?q=%23aurora&src=hash for todays aurora news as the earth continues its pass through Comet ISON's trailing particles.
An Incredible Visualization of Asteroids
An Incredible Visualization of Asteroids from the Sloan Digital Sky Survey. 100,000 asteroids in computer generated simulation from Sloan Digital Sky Survey.
Read more: http://www.universetoday.com/109664/an-incredible-visualization-of-asteroids-from-the-sloan-digital-sky-survey/#ixzz2uBBnO6fO
4 Meteor Showers and Comet Lovejoy
For the past few weeks you may have noticed meteors shooting across the sky. There is the Geminid meteor shower and three other smaller meteor showers in progress. Although with the bright moon, the dimmer meteors aren't as easily seen.
The Geminids started Dec 4 and end Dec 17. On Sat Dec 14, at their peak they can give 120 meteors per hour. Fairly slow for meteors, they are travelling at a speed of 35 km/s. (That's still pretty fast. For comparison, the International space station orbits at 8km/s, and goes around the Earth in 90 minutes.)
There are three smaller showers in progress:
The sigma-Hydrids from Dec 03-Dec 15, peaked on Thurs Dec 12 with 3 meteors/hour, at speeds of 58km/s.
The Comae Berenicids from Dec 12-Jan 23 peaked on Monday Dec 16 with 3 meteors/hour, at speeds of 65km/s
And the December Leo Minorids from Dec 05-Feb 04 peak on Thurs Dec 19 with 5 meteors/hour at 64km/s
Don't forget Comet Lovejoy in the early morning around 7am, before sunrise, a small fuzzy blob visible between Hercules and Corona Borealis above the eastern horizon. The bright moon drowns it out currently, so you'll need binoculars or a telescope to see it and its slight tail.
Cranbrook College Meteor - Aug 2013
Hot News from Rick Nowell: Cranbrook College of the Rockies meteor camera picked up a very long and slow meteor graze or something re-entering the atmosphere. Slow, it takes 30 seconds to cross the sky. That happened on Tuesday 6 Aug 2013 at 4:52 am Mountain Daylight Time (or 10:52 Universal Time).
This is a composite photo with the 30 seconds of video frames superimposed. This has been enhanced in IRIS by subtracting a camera dark frame to remove background hot pixels, offsetting 10 from the bottom amplitudes and applying an adaptive filter to remove some hiss, then taking a logarithmic stretch to bring up background stars, like Vega, Capella and Jupiter. (Altair seems too low when I compare to a starmap though). Note two reference points, a beacon to the North at Alt/Az (1.0, 3.1º), and another beacon to the NW at (3.0º, 309º).
The object kind of sputters and leaves a short smoke trail behind it. Fast at first, then slowing down. But no chunks falling off. It comes out of a thin cloud haze on the West, and vanishes in a band of clouds to the Northeast, into the morning twilight glow. But the sky appears clear in between.
Thin clouds could make it appear to sputter, but the sky appears clear overhead. Here in the attached SlowGraze_6Aug2013_600s.PNG I composited 600 seconds of video trying to enhance cloud structure. The object passes between two bright stars, Deneb and Vega. Capella is visible over the vent, but the rest of the dots are hotpixels. (See attached Mask_Boundary Hotpixels.JPG). You can see Jupiter rising in East, close beside the vent.
(We put the camera beside the vent to shade it from light from some windows to the East.) Jeff Brower’s meteor camera in Kelowna also picked it up.
Esko Lyytinen in Finland tells Jeff that it has been uploaded to a number of websites, even one in Japan, and Jeff says it has received attention in the press.
For the video see:
College of the Rockies, Cranbrook, BC, Canada 49°31’03"N, 115°44'37"W, 940m
Hi all, Esko Lyytinen, of Finland, was once again kind enough to work on our images overnight. He has a preliminary result and he does emphasize he will be refining his modelling once he receives Rick's cvs file for the event. That will hopefully determine if the meteor skipped back into skip or entered earth's lower atmosphere. If we hear from the Albertan cameras, then we may have a much clearer picture of the final path. I did send Rick's lat/lon/el to Esko so that will refine the original data. So with those caveats here is what Esko came up with. (I quote with his permission):
Analysis from Finland
Jeff, I calibrated your camera by means of then stars. And I measured 15 mutually timed positions (of the fireball) in the one second images, with a time span of 16 s ( two missing in between, because not well measurable).
As to the Cranbrook camera coordinates, I may not have these as accurate. I have these: 0.427 km, 115.7 W , 49.6 N .
And as judged from the decimals count, these are only approximate.
I have these early results of the fireball. The radiant azimuth is 230.9 and elevation 4.2 . The reference horizon and meridian for these is 118.0 W, 49.5 N (not so fare from the beginning, rought 70 km after this) .
The entry velocity is 17.1 km/s.
It came in your camera at the height of 85.6 km and to Rick's camera at 82.0 km. The last measured in your camera is at 64.4 km and Rick's 58.7 km.
Because going away, the velocity near the end will not be accurately derived near the end. This data would even give some negative deceleration, which of course can not be true (but may actually be close to zero, mening quite a big meteoroid). If getting from Rick's camera timed data also, might tell this better.
The most low "point" of the track would be maybe 10 seconds after last seen in Rick's camera. It depends on the deceleration if the escaped back to space or not. Because no deceleration is visible in your data, I think it maybe probable that it did escape back to space. It may have been quite big (?)
As told, the precise coordinates of Rick's camera are desirable. And if this would allow for internally timed could probably tell better on the velocity near the end. I see the video in the net, but if timed data does not exists in a more concise form, then the original video would be desirable.
Great work Esko and thanks from everyone at BCMeteors.net, from Jeff Brower, BC Canada
ISON - In Memoriam
Asteroids v. Comets
Paul Wiegert University of Western Ontario predicts possible Jan 12, 2014 meteors?
Veteran meteor researcher Paul Wiegert of the University of Western Ontario has been using a computer to model the trajectory of dust ejected by Comet ISON, and his findings suggest that an unusual meteor shower could be in the offing.
"For several days around January 12, 2014, Earth will pass through a stream of fine-grained debris from Comet ISON," says Wiegert. "The resulting shower could have some interesting properties.
"Instead of burning up in a flash of light, they will drift gently down to the Earth below," he says.
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