Images 28.06.2025 · Istanbul University Observatory Solar Observations

Solar Images Saturday, 28 June 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 10:10 UT
Observer: Ergün EGE
g: 8
f: 16
R: 96
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSO – 2

Group 2 · HR_ – 1

Group 3 · DAI – 7

Group 4 · HS_ – 1

Group 5 · HR_ – 1

Group 6 · CSO – 2

Group 7 · AX_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=28.06.2025
Saat=10:10
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-3.76
Enlemaçısı=2.58
Boylamaçısı=242.05
Boylamfark=1
GKalite=3
GDurum=H.S
Kuzeyaçısı=-0.3
Sırano=20284
AyRasatNo=27
RasatÖnceki=27.06.2025
RasatSonraki=29.06.2025

[Leke Grupları]
Grupsayısı=8:4:4
LekeSayısı=16:11:5
RölatifSayı=96:51:45
01=CSO 02 +06.180 +54.831 296.881 +0.000 0000 0 +06.669 +57.684 +05.367 +51.978 +06.180 +57.184 +06.180 +52.478
02=HR_ 01 +07.515 +18.406 260.456 -1.000 0000 0 +08.710 +19.700 +06.958 +17.805
03=DAI 07 +12.220 -25.543 216.507 +0.000 0000 0 +13.643 -21.690 +10.400 -30.160 +12.220 -21.269 +12.220 -29.816
04=HS_ 01 +20.550 -67.906 174.144 -1.000 0000 0 +21.170 -66.801 +19.930 -69.110
05=HR_ 01 -11.721 +64.141 306.191 -1.000 0000 0 -11.243 +64.809 -12.199 +63.473
06=CSO 02 -16.200 +58.621 300.671 +0.000 0000 0 -14.890 +63.520 -17.114 +54.190 -16.200 +62.852 -16.200 +54.390
07=AX_ 01 -10.159 +36.129 278.179 +0.000 0000 0 -09.851 +36.355 -10.466 +35.904 -10.159 +35.854 -10.159 +36.404
08=AX_ 01 -15.393 -48.258 193.792 +0.000 0000 0 -14.936 -47.800 -15.851 -48.715 -15.393 -48.300 -15.393 -48.215

20250628.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 →

2025/20250628_ee · EE · 9 frames · 192.8 MB · 10:12:49–10:25:52 UT

10:22:51 UT · 30 ms