ABOVE- THE ONLY ECLIPSED IMAGE WHICH WAS AVAILABLE FROM NAGPUR AS CLOUDS AGAIN GATHERED AND THERE WERE RAINS TWICE.
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Thursday, June 16, 2011
15TH JUNE 2011 TOTAL LUNAR ECLIPSE PHOTOS
ABOVE- THE ONLY ECLIPSED IMAGE WHICH WAS AVAILABLE FROM NAGPUR AS CLOUDS AGAIN GATHERED AND THERE WERE RAINS TWICE.
Saturday, June 11, 2011
Saros Cycle, the Science of Predicting Eclipses
Huum...long time since my last writing about Japan Earthquake. Now I'm back with akin of astronomical writing! Hahaha it has been long since my last contact with astronomy. Let me count, umm it has been 1 year!
For the location, each lunar eclipse separated by 1 Saros cycle will move 115 degrees, 55 minutes, 12 seconds farther west. This June 15, 2011 eclipse will be visible throughout East Asia, India, Australia. After one Saros cycle or at June 26, 2029, the central of visibility of total lunar eclipse will move to South America, Antarctica, West Africa. Then after one Saros cycle, or total lunar eclipse of July 7, 2047, the central of visibility will be Pacific Ocean and Australia, and so on.
For the kind of lunar eclipse that would be happen, we can use the standard regression of node every Saros cycle: 0,4779 degrees each cycle. Taking June 15, 2011 total lunar eclipse which node is located after the umbral center, and the umbra which is about 2000 km wide (and the revolution of earth made the time taken by umbra to cover the moon will be slightly longer), we can predict that total eclipses for this saros serial still persist well slight after 2100.
3.) Normally, each move of 1 Saros cycle will put the center of solar eclipse more northwest than its previous location. This is due to difference between Synodical Saros cycle and Draconical Saros cycle as many as 0.036 day.
4.) But, the date when it fall can cause an anomaly for the point 3.) statement. This anomaly can cause the Saros serial "doesn't work as usual": The path of solar eclipse can be still located at equatorial region with total eclipse occur in a consecutive Saros cycle like this example:
The example above is an anomaly of Saros cycle because that nine Saros serial 136 solar eclipses are falling in coincidence with southern summer, so the northern part of earth is tilted away faster than the change of moon's inclination.
In solar eclipse, there are more variables constituting the type, place and specific hour (not date), since it affects only a small area and very short period of time. The variables are gamma (the distance of the apex of moon's shadow to the center of earth divided by the radius of earth), delta T (the difference between UTC and Terrestrial time), and Besseliant Elements (an arranged values to calculate and predict the local circumstances of eclipse for an observer on Earth).
SCIENCE OF ECLIPSE ( LUNAR) AND THE JUNE 15 2011 TOTAL LUNAR ECLIPSE
By Sky Watchers Association of North Bengal(SWAN) Siliguri, West Bengal
http://www.skywatchersindia.co
or
http://www.livestream.com/swan
By Eclipse Chaser Athaenium New Delhi
http://www.ustream.tv/user/ecl
By Astronation.net at http://www.astronation.net/web
The decade's first lunar eclipse as well as the first total lunar eclipse of this year & decade shall take place on Wed 15th June 2011
For a Solar Eclipse to occur, the Moon's Celestial Latitude cannot exceed 1° 27', and must be less than 58' for the Solar Eclipse to be Total or Annular.
Major Ecliptic Orbit A Lunar Eclipse MUST occur if there is a Full Moon within 9° 39' (Celestial Longitude), of a Node, and a Solar Eclipse MUST occur if there is a New Moon within 15° 23' of a Node.
If a New or Full Moon occurs within 5° of a Node, the Eclipse will be Total or Annular.
Additionally:
For a Lunar Eclipse to occur, the Moon's Celestial Latitude at Full Moon cannot exceed about 55', and for that Lunar Eclipse to be Total, Celestial Latitude cannot exceed 26'
2011 | stage | Phase | time (IST) |
Jun 15 | 1 | Moon enters penumbra | 22:52:52 |
Jun 15 | 2 | Moon enters umbra | 23:52:24 |
Jun 16 | 3 | Start of totality | 00:51:57 |
Jun 16 | 4 | Maximum eclipse | 01:42:24 |
Jun 16 | 5 | End of totality | 02:32:50 |
Jun 16 | 6 | Moon leaves umbra | 03:32:22 |
Jun 16 | 7 | Moon leaves penumbra | 04:32:02 |
Wednesday, June 8, 2011
Sunspot region 1126-1127 produces a M2 class Solar Flare
SEVERE SOLARWX
Wednesday, June 1, 2011
Space Shuttle Endeavour returns back home!
SPACE SHUTTLE ENDEAVOUR HAS COMPLETED 25 MISSIONS,299 DAYS IN SPACE AND OVER 122 MILLION MILES COVERED
ABOVE IMAGES-
COURTESY NASA TV HD