Meteor 'above' moon.
Sunday, May 30, 2010
Sunday, May 23, 2010
Commercial Jet - Contrails @ night
A slow passing Jet left a bright string of flashing lights. In this 5 minutes exposure a previous jet's single contrail was ribbon-ed and broaden by upper atmosphere lateral air flow with surprising pretty uniformity. Its less chaotic than i thought.
May 23 2010 Spos
-2.3 Magnitude SPO with another dimmer one
Three meteors ( all Sporadics) from above stacked frames. They all 'appeared' to come from the same radiant with the exception of the short one ( path length requirement). 2 trajectories so one backward projection intersect point ( RA 352.5 Dec=-42.3)...hmmm.
The 3 dotted stars on the mid right were Antares (SCO). VIDEO here
The 3 dotted stars on the mid right were Antares (SCO). VIDEO here
Sunday, May 16, 2010
May sky.. a couple of SPO - a nice x1 posted
a -1.3 mag sporadic ( SPO) 0:51am Sunday May 16 '10
Cloudy in the last few nites, so the moment i saw Crux and Pointers around 11:30pm Sat night i put out my system. Not expecting much activities - May is a quiet month. Bright and/or SPO is the target. The hunt continues
Couldn resist - another post of x1 SPO, this is brighter at -1.6
A good example of the benefit of using video. Imagine you are exposing using film, how do you know the background stars at time of exposure? In the video set up i always started with a few shots with background stars as reference... what if the sky was cloudy when i started the session? Then the second best thing is to enable the software to take a frame at certain interval e.g every 15 minutes. So say the sky clears up when you sleep.. the sampling will capture those ( as well as other bright fast moving objects). All the above is NOT a problem if you system is permanently mounted ( i.e fixed azimuth, elevation) - you only do the background ONCE! It still works for me in ad-hoc mode after all these years!! Video uploaded here.
Friday, May 07, 2010
Eta Aquarids May 7 2010 - bright ones in 5am-6am slot
( 5am - 6am) the captions should says 3,8mm f0,8 lens
See the negative magnitude eta Aquarids above!! video of these five here.
05:22:37 (-02), UT May 6 21:22
05:25:26(-1.4),UT May 6 21:25
05:32:49(-0.8),UT May 6 21:32
05:33:32(-2.0), UT May 6 21:33
05:55:35(-1.5). These are located in or near Sagittarius / Scorpion region. One overlay map plot below
6am - 6:30m ( above)
Before the Moon enter the video lens FOV ( 04 am- 5:00am slot)
For comparison - you are invited to check out last year Orionids captured using the same setup.
Orionids ( November) and Eta Aquarids( May) with similar parent body - Halley's Comet.
Thursday, May 06, 2010
Eta Aquarid ( Halley's comet Debris ) may 6 2010 & iridium 33 flashes ( after collision with cosmos 2251)
Posting individual frames showing the verified eta Aquarids in reverse timestamps order. If not for the automated detection system i doubt any one will bother to waste sleep on week day night to watch this shower with lunar light interference
A eta aquarid grazer.
BONUS visitor : Iridium 33 bright flashes after collision ( collided with Cosmos 2251 in 2009 Feb 10@ 1655UT over Siberia). Instead of total annihilation, the big piece of wreckage* still harbor the reflecting surface (MMA or solar panel that give rise to intense flashes) see in the above image. One tiny flash follow by a big one. *verified by ground level telescope imaging. Video of above flash.
Wednesday, May 05, 2010
Eta Aquarids May 5 am hours
Eta aquarids ( debris from Halleys' Comet ) streak through the moon lit sky.
03:42,04:53, 06:10, 06:23. ( .. its 3.8mm f0.8 lens, wrong caption in video)
Monday, May 03, 2010
Sunday, May 02, 2010
Iridium Flare Outside my window - negative 5 magnitude
Found that there is a -5 mag iridium flare today and the evening weather looked promising. In the distance kites were dotting the early evening southern horizon. But this iridium is @ high elevation and the azimuth is a bit hard to reach from my usual location. I pulled out the analog sony camcorder, fired up one still working lithium battery and i set up the video /tripod in the other window. Using the camcorder large LCD as montor i star hop from the compact trapezium of Corvus to expected flare location @ hydra. I replaced the camcorder with the USB-PC video cable and watch the pc screen running UFOcapture. My watch was synchronised to singtel time annoucement ($0.30 per call 1711). The Iridium Satellite came on time and the i hit the rec button...Watch the uploaded video Iridium 37 here
Saturday, May 01, 2010
Labour Day May 1 early am meteors and glaring moon
A composite showing three meteors with the glaring moon(s). The trumpet-shapes on the lower left are reflections from the aspheric lens
Friday, April 30, 2010
Bright lunar and a meteor
Look at the flaring portion. Which direction do you think the meteor travelled from? Top to bottom or bottom to top? For this one the flaring occurs 1/3 of the flight and is travelling from top to bottom!
Sunday, April 25, 2010
Saturday, April 24, 2010
Friday, April 23, 2010
Cloudy sky and Lyrids
At 0:48am .. a Lyrid was caught through clouds- terminal double burst seen ( near white building in image below).
Sunday, April 11, 2010
Return of meteor activities..
Video here Note in the video the last meteor (closest to the building in above composite plot) ended with a flash-like terminal burst.
Saturday, April 10, 2010
Byte Size Astronomy : Venus & Mercury evening sky April 2010
The bright object in the 06 April [7:39pm] evening sky was Venus and if you looked carefully you will find the elusive and dimmer Mercury nearby too. Taken with a hand held shot with a point and shoot digital camera Nikon CP5100 in Shutter Priority. Here is the video with a little zoom in view. Read more in S & T
Tuesday, April 06, 2010
Monday, April 05, 2010
Iridium 24 - x2 flashes and a glaring moon
Two negative magnitude flashes near the building, direction of travel : upwards
RA 17h31.9min, Dec -71.94, RA 17hr 32min Dec-56.58. Watch video here
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