Images 12.07.2025 · Istanbul University Observatory Solar Observations

Solar Images Saturday, 12 July 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 10:10 UT
Observer: Ergün EGE
g: 6
f: 44
R: 104
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSI – 6

Group 2 · DAI – 10

Group 3 · DAI – 12

Group 4 · EKO – 9

Group 5 · HS_ – 1

Group 6 · DRO – 6

Group 7

RDS data file (.gzd)

[Gözlem]
Tarih=12.07.2025
Saat=10:10
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=2.56
Enlemaçısı=4.07
Boylamaçısı=56.75
Boylamfark=1
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=0.1
Sırano=20297
AyRasatNo=11
RasatÖnceki=11.07.2025
RasatSonraki=13.07.2025

[Leke Grupları]
Grupsayısı=6:4:2
LekeSayısı=44:37:7
RölatifSayı=104:77:27
01=CSI 06 +18.488 +50.674 107.424 +0.000 0000 0 +19.740 +55.464 +17.235 +45.884 +18.488 +55.264 +18.488 +46.840
02=DAI 10 +27.547 +17.650 073.815 +0.000 0000 0 +28.967 +21.904 +26.127 +12.225 +27.547 +21.704 +27.547 +12.425
03=DAI 12 +20.955 -18.360 038.390 +0.000 0000 0 +22.940 -14.970 +19.815 -21.750 +20.955 -15.170 +20.955 -21.550
04=EKO 09 +19.139 -33.977 022.773 12.630 0000 0 +20.974 -28.500 +17.304 -39.948 +17.863 -29.504 +19.655 -37.532
05=HS_ 01 -07.897 -10.600 046.744 -1.000 0000 0 -06.911 -09.221 -08.882 -10.791
06=DRO 06 -14.944 -65.845 350.905 +0.000 0000 0 -13.198 -61.402 -16.690 -70.288 -14.944 -61.602 -14.944 -70.880

20250712.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 →

2025/20250712 · · 10 frames · 214.3 MB · 10:11:55–10:28:42 UT

10:11:55 UT · 30 ms