Images 29.07.2025 · Istanbul University Observatory Solar Observations

Solar Images Tuesday, 29 July 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3229 px)

Time: 12:00 UT
Observer: Olcay PLEVNE
g: 8
f: 33
R: 113
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSI – 3

Group 2 · AX_ – 1

Group 3 · DAI – 7

Group 4 · HS_ – 1

Group 5 · HS_ – 2

Group 6 · BXI – 15

Group 7 · HS_ – 1

Group 8 · DRO – 3

Group 9

Group 10

RDS data file (.gzd)

[Gözlem]
Tarih=29.07.2025
Saat=12:00
Gözlemci=Olcay PLEVNE
KontrolEden=Burçin TANIK
Durumaçısı=9.88
Enlemaçısı=5.59
Boylamaçısı=190.83
Boylamfark=0
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=20310
AyRasatNo=23
RasatÖnceki=25.07.2025
RasatSonraki=30.07.2025

[Leke Grupları]
Grupsayısı=8:1:7
LekeSayısı=33:3:30
RölatifSayı=113:13:100
01=CSI 03 +16.890 +57.211 248.410 +0.000 0000 0 +17.880 +58.879 +15.900 +55.543 +16.890 +58.679 +16.890 +55.743
02=AX_ 01 -13.944 +57.161 247.991 +0.000 0000 0 -13.298 +58.950 -14.589 +56.226 -13.944 +58.230 -13.944 +56.299
03=DAI 07 -27.739 +23.249 214.790 +0.000 0000 0 -25.512 +29.720 -29.966 +16.778 -27.739 +29.520 -27.739 +16.978
04=HS_ 01 -13.272 +14.104 204.934 -1.000 0000 0 -12.166 +15.239 -14.377 +12.969
05=HS_ 02 -18.852 +04.226 195.560 -1.000 0000 0 -17.879 +05.588 -19.825 +02.863
06=BXI 15 -07.469 -00.653 190.177 +0.000 0000 0 -05.500 +03.180 -09.889 -04.325 -07.469 +02.818 -07.469 -04.125
07=HS_ 01 -12.557 -57.711 133.119 -1.000 0000 0 -11.360 -56.707 -13.753 -58.716
08=DRO 03 -12.918 -64.974 125.856 +0.000 0000 0 -11.835 -60.859 -14.000 -69.890 -12.918 -61.590 -12.918 -68.889

20250729.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 →

2025/20250729 · · 9 frames · 192.8 MB · 08:40:47–08:57:07 UT

08:40:47 UT · 30 ms