Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 26 April 2024

‹ 25.04.2024 2024 03.05.2024 ›

Photosphere sunspot drawing and RDS evaluation

26.04.2024 photosphere drawing

High-resolution scan (3230 px)

Time
08:40 UT
Observer
Ergün EGE
g
9
f
27
R
117
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CRO – 3Group 1 · CRO – 3 Group 2 · BXO – 2Group 2 · BXO – 2 Group 3 · CSI – 5Group 3 · CSI – 5 Group 4 · HR_ – 1Group 4 · HR_ – 1 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · CRO – 3Group 6 · CRO – 3 Group 7 · CSI – 6Group 7 · CSI – 6 Group 8 · HS_ – 1Group 8 · HS_ – 1 Group 9 · BXI – 5Group 9 · BXI – 5
RDS data file (.gzd) 
[Gözlem]
Tarih=26.04.2024
Saat=08:40
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=-24.79
Enlemaçısı=-4.6
Boylamaçısı=133.58
Boylamfark=2
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.5
Sırano=19969
AyRasatNo=22
RasatÖnceki=25.04.2024
RasatSonraki=03.05.2024

[Leke Grupları]
Grupsayısı=9:4:5
LekeSayısı=27:11:16
RölatifSayı=117:51:66
01=CRO 03 +17.172 +62.367 195.947 +0.000 0000 0 +17.782 +67.730 +16.562 +57.400 +17.172 +67.320 +17.172 +57.702
02=BXO 02 +13.191 +46.469 180.490 +0.000 0000 0 +14.920 +49.893 +11.461 +43.450 +13.191 +49.693 +13.191 +43.245
03=CSI 05 +21.440 +42.300 175.610 +0.000 0000 0 +22.777 +47.541 +20.103 +36.519 +21.440 +47.341 +21.440 +36.719
04=HR_ 01 +14.223 +32.268 165.848 +0.000 0000 0 +15.129 +33.355 +13.318 +31.181 +14.223 +32.855 +14.223 +31.681
05=AX_ 01 -21.380 +52.778 186.358 +0.000 0000 0 -20.958 +53.380 -21.802 +52.519 -21.380 +52.708 -21.380 +52.847
06=CRO 03 -23.136 +46.205 179.785 +0.000 0000 0 -21.465 +48.500 -24.806 +44.405 -23.136 +47.805 -23.136 +44.605
07=CSI 06 -06.684 +01.962 135.542 +0.000 0000 0 -05.177 +06.106 -08.190 -02.182 -06.684 +05.906 -06.684 -01.982
08=HS_ 01 -25.796 -02.628 130.952 +0.000 0000 0 -24.725 -01.914 -26.866 -03.341 -25.796 -02.414 -25.796 -02.842
09=BXI 05 -08.518 -03.482 130.980 +0.000 0000 0 -06.258 -06.718 -10.777 -00.246 -08.518 -00.446 -08.518 -06.518
20240426.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 →

2024/20240426_ee · EE · 8 frames · 171.4 MB · 08:50:30–09:01:26 UT

08:50:30 UT · 30 ms 08:58:51 UT · 60 ms 08:52:14 UT · 30 ms 08:55:13 UT · 40 ms 09:00:52 UT · 30 ms 08:57:59 UT · 50 ms 09:01:26 UT · 40 ms 08:59:50 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.