Images 19.09.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 19 September 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 07:30 UT
Observer: Ergün EGE
g: 8
f: 54
R: 134
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HR_ – 2

Group 2 · DSI – 8

Group 3 · CSO – 5

Group 4 · HS_ – 2

Group 5 · DAC – 21

Group 6 · CKO – 5

Group 7 · BXI – 4

Group 8 · BXI – 7

RDS data file (.gzd)

[Gözlem]
Tarih=19.09.2025
Saat=07:30
Gözlemci=Ergün EGE
KontrolEden=Süleyman FİŞEK
Durumaçısı=24.73
Enlemaçısı=7.13
Boylamaçısı=226.2
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.2
Sırano=20350
AyRasatNo=16
RasatÖnceki=18.09.2025
RasatSonraki=20.09.2025

[Leke Grupları]
Grupsayısı=8:4:4
LekeSayısı=54:17:37
RölatifSayı=134:57:77
01=HR_ 02 +25.867 +60.389 286.589 -1.000 0000 0 +26.330 +61.153 +25.404 +59.625
02=DSI 08 +10.298 +20.332 246.532 +0.000 0000 0 +12.509 +23.157 +08.860 +17.507 +10.298 +22.957 +10.298 +17.707
03=CSO 05 +04.213 -13.428 212.772 +0.000 0000 0 +05.283 -09.699 +03.143 -17.157 +04.213 -09.899 +04.213 -16.957
04=HS_ 02 +09.627 -50.807 175.393 -1.000 0000 0 +11.665 -48.955 +07.589 -52.659
05=DAC 21 -17.906 +17.218 243.418 +0.000 0000 0 -15.823 +22.634 -19.989 +11.802 -17.906 +22.434 -17.906 +12.200
06=CKO 05 -15.806 -18.319 207.881 13.596 0000 0 -13.563 -12.417 -18.490 -24.222 -14.805 -14.380 -16.947 -23.274
07=BXI 04 -14.431 -29.766 196.434 -1.000 0000 0 -13.876 -27.721 -14.986 -31.811
08=BXI 07 -16.512 -33.864 192.336 +0.000 0000 0 -14.964 -32.702 -18.600 -35.270 +00.000 +00.000 +00.000 +00.000

20250919.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 →

2025/20250919 · · 10 frames · 214.3 MB · 07:34:46–07:51:07 UT

07:34:46 UT · 40 ms