Images 25.04.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 25 April 2025

‹ 23.04.2025 2025 28.04.2025 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3231 px)

Time: 11:25 UT
Observer: Ergün EGE
g: 13
f: 51
R: 181
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DSC – 11

Group 2 · AX_ – 1

Group 3 · BXI – 12

Group 4 · HA_ – 1

Group 5 · HS_ – 2

Group 6 · HR_ – 1

Group 7 · HS_ – 1

Group 8 · CRO – 3

Group 9 · DSI – 13

Group 10 · HS_ – 1

Group 11 · HS_ – 1

Group 12 · AX_ – 1

Group 13 · BXO – 3

RDS data file (.gzd)

[Gözlem]
Tarih=25.04.2025
Saat=11:25
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-24.96
Enlemaçısı=-4.71
Boylamaçısı=8.02
Boylamfark=0
GKalite=3
GDurum=H.S
Kuzeyaçısı=-0.5
Sırano=20231
AyRasatNo=15
RasatÖnceki=23.04.2025
RasatSonraki=28.04.2025

[Leke Grupları]
Grupsayısı=13:4:9
LekeSayısı=51:25:26
RölatifSayı=181:65:116
01=DSC 11 +10.291 +36.780 044.980 +0.000 0000 0 +12.607 +41.180 +07.975 +31.138 +10.291 +40.818 +10.291 +31.338
02=AX_ 01 +15.263 -01.252 006.768 +0.000 0000 0 +15.584 -00.735 +14.942 -01.768 +15.263 -01.235 +15.263 -01.268
03=BXI 12 +11.326 -32.611 335.409 +0.000 0000 0 +12.830 -29.490 +09.822 -36.173 +11.326 -29.249 +11.326 -35.973
04=HA_ 01 +05.619 -64.626 303.394 +0.000 0000 0 +06.672 -63.391 +04.566 -65.860 +05.619 -63.891 +05.619 -65.360
05=HS_ 02 -03.370 +62.379 070.399 +0.000 0000 0 -01.346 +63.174 -04.729 +61.584 -03.370 +62.674 -03.370 +62.840
06=HR_ 01 -19.803 +51.530 059.550 +0.000 0000 0 -19.259 +52.990 -20.347 +50.961 -19.803 +52.440 -19.803 +51.150
07=HS_ 01 -31.811 +30.340 038.360 +0.000 0000 0 -31.237 +31.136 -32.385 +29.543 -31.811 +30.636 -31.811 +30.440
08=CRO 03 -09.130 +22.771 030.791 +0.000 0000 0 -08.657 +26.804 -09.603 +18.738 -09.130 +26.304 -09.130 +19.238
09=DSI 13 -12.935 -05.879 002.141 +0.000 0000 0 -11.410 -01.860 -14.461 -10.671 -12.935 -01.286 -12.935 -10.471
10=HS_ 01 -25.336 -18.417 349.603 +0.000 0000 0 -24.620 -17.561 -26.530 -19.273 -25.336 -18.610 -25.336 -18.773
11=HS_ 01 -17.493 -43.497 324.523 +0.000 0000 0 -16.538 -42.131 -18.449 -44.863 -17.493 -42.631 -17.493 -44.363
12=AX_ 01 -12.700 -54.685 313.335 +0.000 0000 0 -11.756 -54.303 -12.385 -55.680 -12.700 -54.497 -12.700 -54.874
13=BXO 03 -16.590 -67.994 300.260 +0.000 0000 0 -15.800 -65.114 -17.381 -70.873 -16.590 -65.615 -16.590 -70.374

20250425.gzd

Chromosphere (H-α) FITS frames

The images are made automatically with a fixed, gentle rule: uneven illumination and most of the limb darkening are removed, and the brightness is shown on a linear scale (no sharpening); prominences get their own scale outside the limb. Frames are ordered by sharpness (seeing); frames without the Sun (darks, bias) come last. Method →

2025/20250425_ee · EE · 10 frames · 214.3 MB · 11:32:58–11:49:16 UT

11:39:02 UT · 40 ms