Images 28.11.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 28 November 2025

‹ 27.11.2025 2025 03.12.2025 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3231 px)

Time: 09:31 UT
Observer: Ergün EGE
g: 5
f: 20
R: 70
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1

Group 2 · DAO – 7

Group 3 · AX_ – 1

Group 4 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=28.11.2025
Saat=09:31
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=16.99
Enlemaçısı=1.22
Boylamaçısı=21.87
Boylamfark=1
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.1
Sırano=20396
AyRasatNo=19
RasatÖnceki=27.11.2025
RasatSonraki=03.12.2025

[Leke Grupları]
Grupsayısı=5:2:3
LekeSayısı=20:8:12
RölatifSayı=70:28:42
01=AX_ 01 +00.625 +43.530 065.400 +0.000 0000 0 +01.320 +44.127 +00.218 +42.932 +00.625 +43.627 +00.625 +43.432
02=DAO 07 +17.718 +21.541 043.411 +0.000 0000 0 +19.347 +25.104 +16.890 +17.978 +17.718 +24.904 +17.718 +18.178
03=AX_ 01 -16.501 +67.288 089.158 +0.000 0000 0 -16.121 +67.985 -16.882 +66.592 -16.501 +67.485 -16.501 +67.910
04=HS_ 01 -09.467 +10.525 032.395 -1.000 0000 0 -08.733 +11.544 -10.202 +09.506
05=DSC 10 -12.682 +04.799 026.669 27.178 0000 0 -10.857 +08.824 -14.508 +00.775 -11.540 +07.700 -13.491 +03.203

20251128.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 →

2025/20251128 · · 3 frames · 16.1 MB · 09:23:23–09:29:25 UT

09:23:23 UT · 30 ms

09:29:25 UT · 50 ms · over-exposed

09:24:19 UT · 40 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.