Images 20.06.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 20 June 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3231 px)

Time: 09:05 UT
Observer: Ergün EGE
g: 7
f: 31
R: 101
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 1

Group 2 · EHI – 16

Group 3 · CSO – 5

Group 4 · HS_ – 1

Group 5 · HR_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=20.06.2025
Saat=09:05
Gözlemci=Ergün EGE
KontrolEden=Olcay PLEVNE
Durumaçısı=-7.37
Enlemaçısı=1.65
Boylamaçısı=348.53
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.3
Sırano=20276
AyRasatNo=19
RasatÖnceki=19.06.2025
RasatSonraki=21.06.2025

[Leke Grupları]
Grupsayısı=7:3:4
LekeSayısı=31:22:9
RölatifSayı=101:52:49
01=HA_ 01 +14.423 +67.946 056.476 -1.000 0000 0 +15.108 +69.731 +13.738 +66.162
02=EHI 16 +17.884 +43.480 032.100 21.340 0000 0 +20.719 +50.350 +15.480 +36.611 +16.205 +46.778 +19.890 +39.369
03=CSO 05 +20.456 +27.335 015.865 11.919 0000 0 +22.553 +34.752 +18.359 +19.918 +19.304 +32.354 +21.498 +21.896
04=HS_ 01 -11.548 +47.331 035.861 -1.000 0000 0 -10.932 +48.216 -12.164 +46.445
05=HR_ 01 -11.113 -46.818 301.712 -1.000 0000 0 -10.632 -46.198 -11.594 -47.438
06=DAO 05 -14.137 -47.300 301.500 +0.000 0000 0 -12.214 -42.517 -16.600 -51.543 -14.137 -42.717 -14.137 -51.343
07=HA_ 02 -12.417 -57.749 290.781 -1.000 0000 0 -11.155 -56.832 -13.680 -58.665

20250620.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 →

2025/20250620_ee · EE · 9 frames · 192.8 MB · 09:04:28–09:17:58 UT

09:15:57 UT · 30 ms