Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 20 April 2022

‹ 16.04.2022 2022 21.04.2022 ›

Photosphere sunspot drawing and RDS evaluation

20.04.2022 photosphere drawing

High-resolution scan (3233 px)

Time
09:55 UT
Observer
Ö.ÖNALTAŞ=O.Ç.
g
6
f
43
R
103
Seeing
4 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DSI – 14Group 1 · DSI – 14 Group 2 · ESI – 14Group 2 · ESI – 14 Group 3 · EKO – 11Group 3 · EKO – 11 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · AX_ – 2Group 6 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=20.04.2022
Saat=09:55
Gözlemci=Ö.ÖNALTAŞ=O.Ç.
KontrolEden=Süleyman FİŞEK
Durumaçısı=-25.59
Enlemaçısı=-5.19
Boylamaçısı=140.77
Boylamfark=1
GKalite=4
GDurum=G.T
Kuzeyaçısı=-0.2
Sırano=19412
AyRasatNo=13
RasatÖnceki=16.04.2022
RasatSonraki=21.04.2022

[Leke Grupları]
Grupsayısı=6:5:1
LekeSayısı=43:41:2
RölatifSayı=103:91:12
01=DSI 14 +19.819 -30.289 110.481 25.927 0000 0 +21.822 -26.761 +17.815 -33.818 +20.878 -28.448 +19.740 -32.163
02=ESI 14 +16.782 -36.370 104.400 00.702 0000 0 +17.931 -30.759 +15.634 -41.980 +16.802 -31.740 +16.694 -40.647
03=EKO 11 +12.645 -39.780 101.692 00.402 0000 0 +14.465 -32.386 +10.826 -45.771 +12.463 -33.990 +12.528 -43.289
04=HS_ 01 +12.490 -65.770 075.000 +0.000 0000 0 +13.759 -64.120 +11.222 -67.528 +12.490 -64.566 +12.490 -66.974
05=HS_ 01 +23.358 -74.319 066.451 +0.000 0000 0 +24.950 -73.158 +22.622 -75.479 +23.358 -73.659 +23.358 -74.979
06=AX_ 02 -23.570 +02.910 143.680 -1.000 0000 0 -23.570 +02.910 -23.570 +02.910
20220420.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 →

2022/20220420_oot · OOT · 5 frames · 107.1 MB · 10:16:27–10:22:03 UT

10:16:27 UT · 40 ms 10:18:04 UT · 40 ms 10:21:13 UT · 40 ms 10:19:15 UT · 60 ms · over-exposed 10:22:03 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.