Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 6 July 2025

‹ 05.07.2025 2025 07.07.2025 ›

Photosphere sunspot drawing and RDS evaluation

06.07.2025 photosphere drawing

High-resolution scan (3231 px)

Time
07:30 UT
Observer
Süleyman FİŞEK
g
7
f
27
R
97
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HH_ – 1Group 1 · HH_ – 1 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · DSI – 3Group 3 · DSI – 3 Group 4 · AX_ – 2Group 4 · AX_ – 2 Group 5 · CSI – 8Group 5 · CSI – 8 Group 6 · DSO – 3Group 6 · DSO – 3 Group 7 · CRI – 9Group 7 · CRI – 9
RDS data file (.gzd) 
[Gözlem]
Tarih=6.07.2025
Saat=07:30
Gözlemci=Süleyman FİŞEK
KontrolEden=Süleyman FİŞEK
Durumaçısı=-0.19
Enlemaçısı=3.44
Boylamaçısı=137.63
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.5
Sırano=20292
AyRasatNo=6
RasatÖnceki=05.07.2025
RasatSonraki=07.07.2025

[Leke Grupları]
Grupsayısı=7:4:3
LekeSayısı=27:7:20
RölatifSayı=97:47:50
01=HH_ 01 +10.794 +80.801 218.431 +0.000 0000 0 +11.798 +83.376 +09.790 +78.226 +10.794 +82.876 +10.794 +78.726
02=HS_ 01 +21.593 +34.326 171.956 +0.000 0000 0 +22.454 +35.491 +20.732 +33.160 +21.593 +34.992 +21.593 +33.660
03=DSI 03 +02.629 +32.534 170.165 +0.000 0000 0 +03.151 +35.233 +02.107 +29.836 +02.629 +34.733 +02.629 +30.336
04=AX_ 02 +10.370 -05.170 132.613 +0.000 0000 0 +11.116 -04.779 +08.959 -05.254 +10.370 -05.432 +10.370 -04.908
05=CSI 08 -19.657 +50.134 187.764 +0.000 0000 0 -18.164 +55.396 -21.150 +44.872 -19.657 +55.196 -19.657 +45.720
06=DSO 03 -21.644 +04.682 142.312 +0.000 0000 0 -19.932 +06.175 -23.356 +03.189 -21.644 +05.975 -21.644 +03.389
07=CRI 09 -10.860 -00.600 137.624 +0.000 0000 0 -08.823 +01.840 -11.348 -01.852 -10.860 +01.640 -10.860 -01.652
20250706.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 →

2025/20250706_sf · SF · 6 frames · 128.6 MB · 07:40:54–07:43:53 UT

07:43:53 UT · 3 ms 07:42:53 UT · 3 ms 07:41:53 UT · 3 ms 07:40:54 UT · 6 ms 07:42:23 UT · 6 ms 07:43:23 UT · 6 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.