Astronomical and geophysical observatory in Modra, Slovakia

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Info about the observatory

Address:

Astronomical observatory
P.O.Box 4
900 01 Modra
Slovakia
tel.: +421 336475261

Longitude:

17°,27402056 E

Latitude:

48°,37327278 N

Altitude:

531.10 m

MPC code:

118

Sun

Solar observations in the H-alfa line

Few month ago we've decided to extend our observations and start solar program. We use 20 cm refractor (f=304) with 8 cm aperture and broader H-alpha filter. Telescope gives resolution of 1.5 arc sec. All observations are recorded by VHS video-recorder then digitalised and processed.

In this "most popular" solar spectral line - H-alfa - we can see chromospheric flares as well as active regions from which they (usually) emerge. We observe prominences over the edge of solar disc or as dark filaments on the disc

Images of AR 8636 July 7th, 1999

animácia aktívnej oblasti AR8636

Images show evolution of the solar flare on July 19th, 1999. This structure was probably connected with new solar spots emerging in active region No. 8636. Following Goes-10 measurements in soft x-ray bandwidth, flare started at 8:16 UT, reached maximum at 8:46 and dissapeared at 9:10 UT.

Animation consists of images shown below.


 

image #1 - 19.7.1999 8:30 UT
image #2 - 19.7.1999 8:40 UT
image #3 - 19.7.1999 8:50 UT
image #4 - 19.7.1999 9:10 UT
image #5 - 19.7.1999 9:30 UT
image #6 - 19.7.1999 10:30 UT

 

Images of AR 8636 July 25th,1999

animácia aktívnej oblasti AR8636

Images show evolution of huge filament in the AR8636 on July 25th, 1999. Because of broader filter we can see solar photosphere and chromosphere at once. It gives us additional information on parent active-region of filaments.


 


image #1 - 25.7.1999 7:12 UT
image #2 - 25.7.1999 7:46 UT
image #3 - 25.7.1999 7:56 UT
image #4 - 25.7.1999 8:06 UT
image #5 - 25.7.1999 8:16 UT
image #6 - 25.7.1999 8:26 UT
image #7 - 25.7.1999 8:36 UT
image #8 - 25.7.1999 8:51 UT

 

Total solar eclipse August 11th, 1999

Digitalised images of total eclipse made at Kiskunmajsa (Hungary) on August 11, 1999 by teleobjective (f=0.5m) under short exposure 1/60s. Therefore only inner part of the corona, as well as many pink prominences, are visible during the total eclipse phase. The other two images were taken immediately after third contact, illustrating current sky conditions. (Note: No scientific purposes involved these pictures.)



 

 

 

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