Images 23.05.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 23 May 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 09:45 UT
Observer: Ergün EGE
g: 9
f: 28
R: 118
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HH_ – 1

Group 2 · CRO – 6

Group 3 · HS_ – 1

Group 4 · CRO – 2

Group 5 · HS_ – 1

Group 6 · CRI – 9

Group 7 · HS_ – 1

Group 8 · HR_ – 1

Group 9 · BXO – 6

RDS data file (.gzd)

[Gözlem]
Tarih=23.05.2025
Saat=09:45
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-18.36
Enlemaçısı=-1.7
Boylamaçısı=358.73
Boylamfark=1
GKalite=3
GDurum=
Kuzeyaçısı=-0.4
Sırano=20252
AyRasatNo=18
RasatÖnceki=22.05.2025
RasatSonraki=24.05.2025

[Leke Grupları]
Grupsayısı=9:3:6
LekeSayısı=28:8:20
RölatifSayı=118:38:80
01=HH_ 01 +13.723 +59.424 058.154 +0.000 0000 0 +15.212 +61.640 +12.234 +57.783 +13.723 +60.853 +13.723 +57.995
02=CRO 06 +19.990 -32.793 325.937 +0.000 0000 0 +21.438 -29.767 +18.542 -35.820 +19.990 -29.967 +19.990 -35.620
03=HS_ 01 +05.897 -52.581 306.149 +0.000 0000 0 +06.643 -50.986 +05.151 -54.176 +05.897 -51.486 +05.897 -53.676
04=CRO 02 -05.779 +71.950 070.680 +0.000 0000 0 -04.699 +74.698 -06.859 +69.202 -05.779 +74.498 -05.779 +69.402
05=HS_ 01 -12.228 +19.962 018.692 +0.000 0000 0 -11.717 +20.338 -12.739 +19.585 -12.228 +19.838 -12.228 +20.860
06=CRI 09 -04.545 +17.140 015.744 +0.000 0000 0 -03.486 +19.650 -05.605 +14.964 -04.545 +18.865 -04.545 +15.164
07=HS_ 01 -13.136 -21.265 337.465 +0.000 0000 0 -11.980 -20.330 -14.292 -22.497 -13.136 -20.681 -13.136 -21.848
08=HR_ 01 -06.370 -31.145 327.585 +0.000 0000 0 -05.786 -30.548 -06.954 -31.743 -06.370 -31.480 -06.370 -31.243
09=BXO 06 -13.201 -53.243 305.487 +0.000 0000 0 -12.244 -50.365 -14.157 -56.121 -13.201 -50.565 -13.201 -55.921

20250523.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 →

2025/20250523_ee · EE · 9 frames · 192.8 MB · 09:52:57–10:13:26 UT

10:08:48 UT · 20 ms