Images 24.10.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 24 October 2025

‹ 23.10.2025 2025 26.10.2025 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 09:00 UT
Observer: Ergün EGE
g: 7
f: 14
R: 84
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1

Group 2 · CRO – 3

Group 3 · HS_ – 1

Group 4 · HS_ – 1

Group 5 · CAO – 6

Group 6 · AX_ – 1

Group 7 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=24.10.2025
Saat=09:00
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=25.49
Enlemaçısı=5.11
Boylamaçısı=123.59
Boylamfark=2
GKalite=3
GDurum=B.A , Y.B
Kuzeyaçısı=-0.5
Sırano=20372
AyRasatNo=15
RasatÖnceki=23.10.2025
RasatSonraki=26.10.2025

[Leke Grupları]
Grupsayısı=7:3:4
LekeSayısı=14:5:9
RölatifSayı=84:35:49
01=HS_ 01 +09.787 +49.430 173.200 +0.000 0000 0 +10.566 +50.605 +09.900 +48.255 +09.787 +50.105 +09.787 +48.755
02=CRO 03 +15.146 -38.587 085.300 +0.000 0000 0 +16.138 -36.730 +14.155 -41.100 +15.146 -36.273 +15.146 -40.900
03=HS_ 01 +01.716 -67.332 056.258 +0.000 0000 0 +02.844 -65.865 +00.587 -68.800 +01.716 -66.365 +01.716 -68.299
04=HS_ 01 -08.646 +09.146 132.736 +0.000 0000 0 -07.591 +09.944 -09.701 +08.349 -08.646 +09.443 -08.646 +08.849
05=CAO 06 -13.431 +08.665 132.255 +0.000 0000 0 -11.614 +10.984 -15.248 +06.347 -13.431 +10.784 -13.431 +06.547
06=AX_ 01 -08.137 -12.179 111.411 +0.000 0000 0 -07.894 -11.533 -08.381 -12.825 -08.137 -12.330 -08.137 -12.325
07=HS_ 01 -05.722 -22.585 101.500 +0.000 0000 0 -05.410 -21.811 -06.402 -23.358 -05.722 -22.311 -05.722 -22.858

20251024.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 →

2025/20251024 · · 9 frames · 192.8 MB · 10:02:50–10:22:03 UT

10:19:04 UT · 30 ms