Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 25 September 2025

‹ 24.09.2025 2025 30.09.2025 ›

Photosphere sunspot drawing and RDS evaluation

25.09.2025 photosphere drawing

High-resolution scan (3230 px)

Time
06:00 UT
Observer
Süleyman FİŞEK
g
11
f
40
R
150
Seeing
2 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · HH_ – 2Group 2 · HH_ – 2 Group 3 · HS_ – 2Group 3 · HS_ – 2 Group 4 · CHO – 5Group 4 · CHO – 5 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · CSO – 2Group 6 · CSO – 2 Group 7 · DSI – 4Group 7 · DSI – 4 Group 8 · CSO – 2Group 8 · CSO – 2 Group 9 · CRI – 5Group 9 · CRI – 5 Group 10 · DSC – 12Group 10 · DSC – 12 Group 11 · ESI – 4Group 11 · ESI – 4 Group 12Group 12
RDS data file (.gzd) 
[Gözlem]
Tarih=25.09.2025
Saat=06:00
Gözlemci=Süleyman FİŞEK
KontrolEden=Korhan YELKENCİ
Durumaçısı=25.47
Enlemaçısı=6.96
Boylamaçısı=147.83
Boylamfark=3
GKalite=2
GDurum=Y.B
Kuzeyaçısı=-0.4
Sırano=20356
AyRasatNo=22
RasatÖnceki=24.09.2025
RasatSonraki=30.09.2025

[Leke Grupları]
Grupsayısı=11:3:8
LekeSayısı=40:5:35
RölatifSayı=150:35:115
01=HS_ 01 +03.969 +69.651 217.481 -1.000 0000 0 +04.777 +70.670 +03.161 +68.632
02=HH_ 02 +10.914 +27.796 175.626 -1.000 0000 0 +12.260 +29.669 +09.803 +25.923
03=HS_ 02 +04.715 -29.684 118.146 -1.000 0000 0 +05.391 -29.750 +04.390 -30.294
04=CHO 05 -15.543 +63.823 211.653 +0.000 0000 0 -13.958 +66.330 -17.127 +61.612 -15.543 +65.833 -15.543 +61.812
05=AX_ 01 -22.636 +63.647 211.477 -1.000 0000 0 -22.636 +63.647 -22.636 +63.647
06=CSO 02 -12.885 +55.934 203.764 +0.000 0000 0 -12.180 +57.584 -13.590 +54.284 -12.885 +57.840 -12.885 +54.784
07=DSI 04 -03.550 +49.564 197.394 +0.000 0000 0 -01.581 +52.667 -05.518 +46.460 -03.550 +52.467 -03.550 +46.660
08=CSO 02 -06.808 +39.598 187.428 +0.000 0000 0 -06.209 +40.790 -07.407 +38.406 -06.808 +40.290 -06.808 +38.906
09=CRI 05 -16.809 -14.860 133.744 +0.000 0000 0 -15.533 -13.690 -18.850 -15.102 +00.000 +00.000 +00.000 +00.000
10=DSC 12 -09.566 -17.540 130.776 +0.000 0000 0 -07.207 -14.355 -11.926 -19.752 -09.566 -14.555 -09.566 -19.552
11=ESI 04 -13.513 -46.530 101.300 11.104 0000 0 -11.790 -39.705 -15.948 -53.354 -12.718 -41.920 -14.697 -52.620
20250925.gzd

Chromosphere (H-α) FITS frames

No chromosphere observation for this day.

Coronado H-α animations from frame sequences

No Coronado observation for this day.