Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 13 June 2025

‹ 12.06.2025 2025 14.06.2025 ›

Photosphere sunspot drawing and RDS evaluation

13.06.2025 photosphere drawing

High-resolution scan (3230 px)

Time
13:00 UT
Observer
Süleyman FİŞEK
g
9
f
63
R
153
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · ESC – 14Group 1 · ESC – 14 Group 2 · HS_ – 3Group 2 · HS_ – 3 Group 3 · HS_ – 1Group 3 · HS_ – 1 Group 4 · DSI – 16Group 4 · DSI – 16 Group 5 · ESI – 4Group 5 · ESI – 4 Group 6 · HK_ – 3Group 6 · HK_ – 3 Group 7 · EKC – 14Group 7 · EKC – 14 Group 8 · DRI – 5Group 8 · DRI – 5 Group 9 · CRI – 3Group 9 · CRI – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=13.06.2025
Saat=13:00
Gözlemci=Süleyman FİŞEK
KontrolEden=Korhan YELKENCİ
Durumaçısı=-10.32
Enlemaçısı=0.84
Boylamaçısı=79.03
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.5
Sırano=20269
AyRasatNo=12
RasatÖnceki=12.06.2025
RasatSonraki=14.06.2025

[Leke Grupları]
Grupsayısı=9:5:4
LekeSayısı=63:38:25
RölatifSayı=153:88:65
01=ESC 14 +05.790 +36.428 115.458 +0.000 0000 0 +07.146 +41.599 +04.433 +31.256 +05.790 +41.399 +05.790 +31.456
02=HS_ 03 +14.540 -20.156 058.874 +0.000 0000 0 +15.157 -18.787 +12.950 -21.524 +14.540 -19.288 +14.540 -21.240
03=HS_ 01 +09.946 -38.391 040.639 +0.000 0000 0 +10.432 -37.848 +09.460 -38.934 +09.946 -38.348 +09.946 -38.434
04=DSI 16 +17.164 -44.712 034.318 +0.000 0000 0 +18.952 -40.794 +15.376 -48.631 +17.164 -40.994 +17.164 -48.431
05=ESI 04 +20.310 -58.250 021.500 +0.000 0000 0 +21.836 -51.942 +18.227 -64.108 +20.310 -52.142 +20.310 -63.908
06=HK_ 03 -14.493 +69.942 148.972 +0.000 0000 0 -12.971 +73.164 -16.160 +66.721 -14.493 +72.663 -14.493 +67.221
07=EKC 14 -15.821 +50.908 129.938 +0.000 0000 0 -12.464 +56.922 -19.178 +44.894 -15.821 +56.722 -15.821 +45.940
08=DRI 05 -08.204 -01.921 077.109 +0.000 0000 0 -05.909 -00.253 -10.499 -03.589 -08.204 -00.453 -08.204 -03.389
09=CRI 03 -11.937 -46.117 032.913 +0.000 0000 0 -11.600 -43.904 -12.275 -48.329 -11.937 -44.404 -11.937 -47.830
20250613.gzd

Chromosphere (H-α) FITS frames

H-α

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 →

2025/20250613_sf · SF · 6 frames · 128.6 MB · 13:06:07–13:09:07 UT

13:06:07 UT · 30 ms 13:08:37 UT · 30 ms 13:07:37 UT · 30 ms 13:08:07 UT · 60 ms · over-exposed 13:09:07 UT · 60 ms · over-exposed 13:07:07 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.