Images 22.04.2021 · Istanbul University Observatory Solar Observations

Solar Images Thursday, 22 April 2021

‹ 21.04.2021 2021 26.04.2021 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3228 px)

Time: 09:20 UT
Observer: Burçin TANIK
g: 4
f: 13
R: 53
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 3

Group 2 · BXI – 6

Group 3 · HS_ – 3

Group 4 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=22.04.2021
Saat=09:20
Gözlemci=Burçin TANIK
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=-25.35
Enlemaçısı=-4.99
Boylamaçısı=252.23
Boylamfark=1
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=-1.1
Sırano=19167
AyRasatNo=13
RasatÖnceki=21.04.2021
RasatSonraki=26.04.2021

[Leke Grupları]
Grupsayısı=4:1:3
LekeSayısı=13:3:10
RölatifSayı=53:13:40
01=AX_ 03 +18.477 +75.847 328.770 +0.000 0000 0 +19.547 +78.168 +17.407 +73.525 +18.477 +77.968 +18.477 +73.725
02=BXI 06 -21.450 +11.435 263.665 15.500 0000 0 -19.371 +15.138 -22.718 +07.731 -20.594 +13.443 -22.210 +08.290
03=HS_ 03 -27.228 +04.161 256.391 -1.000 0000 0 -26.457 +05.470 -28.000 +03.276
04=HS_ 01 -15.889 -47.379 204.851 -1.000 0000 0 -15.220 -46.549 -16.756 -48.209

20210422.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 →

2021/20210422_bto · BTO · 6 frames · 128.6 MB · 09:28:13–09:52:43 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.