an annular solar eclipse will occur on 26 january 2009. the total eclipse is visible from parts of islands of indonesia. sri lanka will be able to witness a 17% partial eclipse from 2p.m. to 4p.m. in colombo, with the maximum eclipse occurring at 3.10p.m.
ජනවාරි 26 දින (2009) ප.ව. 2 සිට ප.ව. 4ට පමන වලයාකාර සූර්යග්රහනයක් ඔබට නිරීක්ශනය කරන්න පුලුවනි. සූර්යා ඉන්දුනීසියානු දූපත් වල සම්පූර්න ලෙස ග්රහනය වෙනවා. ලංකාවට දැක ගත ගන්න පුලුවන්වන්නේ 17% සූර්ය ග්රහනයකි. උපරිම ග්රහනය ප.ව. 3.10ට.
2009 இற்கான சூரிய கிரகணம் , தை மாதம் 26 திகதி (26/01/2009) நிகழவுள்ளது. இந்த பூரண கிரகணமானது இந்தோனேசியா தீவுகளின் சில பகுதிகளில் தொளிவகத்தெரியும். இலங்கையில் 17% பங்கு கிரகணமே தெரியும். கொழும்பில் பிற்பகல் 2 மணியில் இருந்து பிற்பகல் 4 மணி வரையான காலப்பகுதியில் இது தெரியும். பிற்பகல் 3.10 மணிக்கு அது உச்சத்தை அடையும்.
the above image was taken by anthony ayiomamitis on the roof of the Institute of nuclear physics, novosibirsk, russia. copyrights apply.
thank you vahees for the tamil translation.
thank you aanandawardana for assisting me in the sinhala translation. :)
What's an Annular Solar Eclipse?
the sun and the moon appear to be almost of the same size to an observer on earth. the earth orbits around the sun in an elliptical path. in january the earth is closer to the sun than rest of the year because of this elliptical orbit. in fact on january 04 the earth was closest to the sun. furthermore, the moon will be at it's apogee (or furthest from earth) on january 23rd. for these reason we can expect the sun to appear bigger than the moon. the moon will eclipse the sun forming a distinct ring. hence the term annular eclipse. (apogee and perigee times can be found in a blog post i made previously. see links bellow.)
වලයාකාර සූර්යග්රහනයක් කියන්නෙ මොකද්ද?
පෘථිවියේ සිටින අපට සූර්යා සහ චන්ද්රයා සමප්රමානව පෙනෙනවා. මෙයට හේතුව සූර්යා, චන්ද්රයා මෙන් 400ක ප්රමානයකි; සූර්යා, චන්ද්රයා මෙන් 400ක පමන දුරකින් පෘථිවියට සිටී. නමුත් මෙම 400 සාමාන්ය අගයක්. සූර්යා චටා පෘථිවිය ඉලිප්සාකාර පථයක ගමන් කරයි. සූර්යා මෙම ඉලිප්සයේ නාභියකි. ජනවාරි මාසයේ සූර්යා සහ පෘථිවිය ෙමම ඉලිප්සයේ ආසන්නතම ඡාපයක පිහිටනවා. ඉතින් සූර්යා වෙන මාසවලට වඩා මදක් පමන ලොකුවට පෙනෙනවා.
චන්ද්රයා, පෘථිවිය චටා ඉලිප්සාකාර පථයක ගමන් කරයි. පෘථිවිය මෙම ඉලිප්සයේ නාභියකි. ජනවාරි 23දා චන්ද්රයා, පෘථිවියට දුරින්ම පිහිටයි. ජනවාරි 26දා චන්ද්රයා මදක් පමන කුඩාවට පෙනෙනවා.
මෙම සංසිද්ධි නිසා වලයාකාර සූර්යග්රහනය ඉන්දුනීසියානු දූපත් වල දැක ගත හැක.
பூரண சூரிய கிரகணம் என்றால் என்ன?
பூமியில் இருந்து பார்ப்பவர்களுக்கு சூரியனும் சந்திரனும் ஒரே அளவாகத்தான் தெரியும் . பூமி சூரியனை ஒரு நீள் வட்டப்பாதையில் சுற்றி வருகிறது . இவ்வகையில் தை மாதம் 4ம் திகதி பூமியும் சூரியனும் ஒன்றுக்கொன்று மிக அருகாமையில் வந்தன. ஆனால் இதேசமயம் சந்திரன் பூமியில் இருந்து வெகு தொலைவில் செல்கிறது. இக்காரணங்களால் இம்முறை சூரியன் சந்திரனிலும் பார்க்க பெரிதாக தெரியப்போகிறது.
சந்திரனானது சூரியனை மறைத்து ஒரு பெரிய ஒளிவட்டத்தை உருவாக்கும். இதுவே பூரண சூரிய கிரகணம்.
Eclipse Altitudes and Azimuths
Source: NASA
The altitude a and azimuth A of the Sun or Moon during an eclipse depend on the time and the observer's geographic coordinates. They are calculated as follows:
h = 15 (GST + UT - α ) + λ
a = arcsin [sin δ sin φ + cos δ cos h cos φ]
A = arctan [-(cos δ sin h)/(sin δ cos φ - cos δ cos h sin φ)]
where
h = hour angle of Sun or Moon
a = altitude
A = azimuth
GST = Greenwich Sidereal Time at 0:00 UT
UT = Universal Time
α = right ascension of Sun or Moon
δ = declination of Sun or Moon
λ = observer's longitude (east +, west -)
φ = observer's latitude (north +, south -)
Click here to use NASA's JavaScript based Solar Eclipse locator.
During the eclipses of 2009, the values for GST and the geocentric Right Ascension and Declination of the Sun or the Moon (at greatest eclipse) are as follows:
Eclipse Date GST α δ
Annular Solar 2009 Jan 26 8.383 20.592 -18.649
Penumbral Lunar 2009 Feb 09 9.321 9.528 13.527
Penumbral Lunar 2009 Jul 07 19.033 19.136 -23.861
Total Solar 2009 Jul 22 19.999 8.107 20.267
Penumbral Lunar 2009 Aug 06 20.979 21.046 -15.576
Partial Lunar 2009 Dec 31 6.690 6.756 24.020
Eclipse Details for Colombo, Sri Lanka
for other regions use the NASA eclipse calculator. (see links bellow)
- Eclipse Starts at: 14:02:43
- Eclipse Ends at: 16:12:08
- Maximum Eclipse
- Time: 15:11:43
- Sun Altitude Angle: 41°
- Sun Azimuth Angle: 238°
- Eclipse Fraction: 0.171
සුර්යග්රහනයේ කොලඹ නගරය සඳහා කාල සටහන සහ පිහිටුම් විස්තර
- ආරම්භය: 14:02:43
- අවසානය: 16:12:08
- උපරීම ග්රහනය
- වේලව: 15:11:43
- සිතකය සිට කෝනය: 41°
- උතුර සිට දක්ෂිනාවර්තව කෝනය: 238°
- සුර්යග්රහනයේ ප්රමානය: 0.171
கொழும்பில் சூரிய கிரகணம் தெரியும் நேர விபரம்
- கிரகணம் தொடங்கும் நேரம் : 14:02:43
- கிரகணம் முடியும் நேரம் :16:12:08
- உச்ச கிரகணம் :
- நேரம் 15:11:43
- சூரிய அகலாங்கு 41°
- சூரிய கோணம் 238°
- கிரகண பங்கு 0.171 ( 17% )
