Images 02.09.2025 · Istanbul University Observatory Solar Observations

Solar Images Tuesday, 2 September 2025

‹ 30.08.2025 2025 03.09.2025 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 07:35 UT
Observer: Korhan YELKENCİ
g: 12
f: 39
R: 159
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1

Group 2 · AX_ – 1

Group 3 · AX_ – 2

Group 4 · CAI – 6

Group 5 · HS_ – 1

Group 6 · HS_ – 1

Group 7 · FAI – 6

Group 8 · AX_ – 2

Group 9 · EAC – 14

Group 10 · HS_ – 1

Group 11 · CAI – 3

Group 12 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=2.09.2025
Saat=07:35
Gözlemci=Korhan YELKENCİ
KontrolEden=Korhan YELKENCİ
Durumaçısı=21.41
Enlemaçısı=7.21
Boylamaçısı=90.63
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.4
Sırano=20335
AyRasatNo=1
RasatÖnceki=30.08.2025
RasatSonraki=03.09.2025

[Leke Grupları]
Grupsayısı=12:8:4
LekeSayısı=39:20:19
RölatifSayı=159:100:59
01=AX_ 01 +17.807 +86.288 176.918 -1.000 0000 0 +17.807 +86.288 +17.807 +86.288
02=AX_ 01 +10.273 +86.340 176.664 -1.000 0000 0 +10.273 +86.340 +10.273 +86.340
03=AX_ 02 +18.561 +30.944 121.574 +0.000 0000 0 +19.959 +32.357 +17.163 +29.530 +00.000 +00.000 +00.000 +00.000
04=CAI 06 +04.771 +25.177 115.807 48.482 0000 0 +06.830 +27.390 +02.712 +23.315 +06.630 +26.813 +02.912 +23.515
05=HS_ 01 +17.429 -22.959 067.671 +0.000 0000 0 +18.281 -22.199 +16.577 -23.718 +17.429 -22.699 +17.429 -23.219
06=HS_ 01 +09.340 -26.306 064.324 +0.000 0000 0 +10.344 -25.207 +08.336 -27.405 +09.340 -25.707 +09.340 -26.905
07=FAI 06 +29.575 -47.406 043.224 12.650 0000 0 +31.627 -38.317 +27.522 -56.496 +31.427 -38.660 +27.722 -56.296
08=AX_ 02 +06.830 -65.210 025.609 +0.000 0000 0 +07.209 -64.640 +06.450 -65.403 +06.830 -65.328 +06.830 -65.910
09=EAC 14 -18.772 +40.689 131.319 25.554 0000 0 -15.740 +33.109 -22.471 +48.269 -15.326 +48.690 -22.271 +33.309
10=HS_ 01 -21.168 +26.931 117.561 +0.000 0000 0 -20.186 +28.176 -22.149 +25.686 -21.168 +27.676 -21.168 +26.186
11=CAI 03 -14.960 +20.430 111.600 32.959 0000 0 -13.826 +22.101 -16.930 +18.760 -14.260 +21.843 -15.893 +18.960
12=HS_ 01 -13.892 -81.770 009.553 +0.000 0000 0 -12.251 -79.146 -15.532 -83.900 -13.892 -79.893 -13.892 -83.647

20250902.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 →

2025/20250902_ky · KY · 10 frames · 214.2 MB · 07:46:05–07:59:51 UT

07:58:21 UT · 30 ms