Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 26 April 2023

‹ 25.04.2023 2023 28.04.2023 ›

Photosphere sunspot drawing and RDS evaluation

26.04.2023 photosphere drawing

High-resolution scan (3230 px)

Time
08:00 UT
Observer
Olcay PLEVNE
g
6
f
35
R
95
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 5Group 1 · BXI – 5 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · BXI – 4Group 3 · BXI – 4 Group 4 · DSO – 3Group 4 · DSO – 3 Group 5 · CHI – 7Group 5 · CHI – 7 Group 6 · DSI – 15Group 6 · DSI – 15
RDS data file (.gzd) 
[Gözlem]
Tarih=26.04.2023
Saat=08:00
Gözlemci=Olcay PLEVNE
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=-24.91
Enlemaçısı=-4.68
Boylamaçısı=285.01
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.4
Sırano=19699
AyRasatNo=17
RasatÖnceki=25.04.2023
RasatSonraki=28.04.2023

[Leke Grupları]
Grupsayısı=6:4:2
LekeSayısı=35:13:22
RölatifSayı=95:53:42
01=BXI 05 +23.743 +33.677 318.687 +0.000 0000 0 +25.353 +35.791 +22.133 +31.563 +23.743 +35.591 +23.743 +31.763
02=AX_ 01 +16.305 -08.695 276.315 -1.000 0000 0 +16.305 -08.695 +16.305 -08.695
03=BXI 04 +07.883 -22.757 262.253 +0.000 0000 0 +09.965 -20.905 +05.800 -24.609 +07.883 -21.105 +07.883 -24.409
04=DSO 03 +18.437 -73.328 211.682 +0.000 0000 0 +20.257 -70.326 +16.617 -76.329 +18.437 -70.526 +18.437 -76.129
05=CHI 07 -17.974 -15.606 269.404 +0.000 0000 0 -16.570 -10.163 -19.891 -21.480 -17.974 -10.363 -17.974 -20.848
06=DSI 15 -23.240 -21.430 263.967 +0.000 0000 0 -20.847 -15.735 -25.201 -26.352 -23.240 -15.935 -23.240 -26.152
20230426.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 →

2023/20230426_op · OP · 4 frames · 85.7 MB · 08:07:19–08:10:07 UT

08:08:27 UT · 30 ms 08:07:19 UT · 30 ms 08:10:07 UT · 60 ms · over-exposed 08:10:07 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.