Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 10 October 2025

‹ 08.10.2025 2025 12.10.2025 ›

Photosphere sunspot drawing and RDS evaluation

10.10.2025 photosphere drawing

High-resolution scan (3224 px)

Time
10:15 UT
Observer
Olcay PLEVNE
g
4
f
20
R
60
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 6Group 1 · BXI – 6 Group 2 · BXI – 2Group 2 · BXI – 2 Group 3 · BXI – 10Group 3 · BXI – 10 Group 4 · AX_ – 2Group 4 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=10.10.2025
Saat=10:15
Gözlemci=Olcay PLEVNE
KontrolEden=Korhan YELKENCİ
Durumaçısı=26.25
Enlemaçısı=6.19
Boylamaçısı=307.56
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=20363
AyRasatNo=6
RasatÖnceki=08.10.2025
RasatSonraki=12.10.2025

[Leke Grupları]
Grupsayısı=4:1:3
LekeSayısı=20:6:14
RölatifSayı=60:16:44
01=BXI 06 +07.408 -55.695 251.865 +0.000 0000 0 +08.590 -49.974 +06.227 -61.416 +07.408 -50.174 +07.408 -61.216
02=BXI 02 -09.620 +70.207 017.767 +0.000 0000 0 -08.790 +72.804 -09.334 +67.610 -09.620 +72.304 -09.620 +68.110
03=BXI 10 -09.353 +16.570 323.617 +0.000 0000 0 -08.369 +18.285 -10.338 +13.830 -09.353 +18.850 -09.353 +14.300
04=AX_ 02 -19.439 -58.817 248.743 +0.000 0000 0 -18.833 -58.700 -20.450 -59.564 -19.439 -58.885 -19.439 -58.749
20251010.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.