Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 22 February 2023

‹ 21.02.2023 2023 23.02.2023 ›

Photosphere sunspot drawing and RDS evaluation

22.02.2023 photosphere drawing

High-resolution scan (3228 px)

Time
08:45 UT
Observer
Olcay PLEVNE
g
4
f
28
R
68
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CRO – 2Group 1 · CRO – 2 Group 2 · ESI – 14Group 2 · ESI – 14 Group 3 · DSI – 6Group 3 · DSI – 6 Group 4 · DSI – 6Group 4 · DSI – 6
RDS data file (.gzd) 
[Gözlem]
Tarih=22.02.2023
Saat=08:45
Gözlemci=Olcay PLEVNE
KontrolEden=Burçin TANIK
Durumaçısı=-19.6
Enlemaçısı=-7.07
Boylamaçısı=35.47
Boylamfark=2
GKalite=3
GDurum=B.A , K.T
Kuzeyaçısı=0.0
Sırano=19662
AyRasatNo=17
RasatÖnceki=21.02.2023
RasatSonraki=23.02.2023

[Leke Grupları]
Grupsayısı=4:3:1
LekeSayısı=28:22:6
RölatifSayı=68:52:16
01=CRO 02 +19.525 +68.365 103.835 +0.000 0000 0 +19.999 +71.987 +19.520 +64.744 +19.525 +71.486 +19.525 +65.243
02=ESI 14 +24.266 -04.486 030.984 +0.000 0000 0 +26.560 +02.260 +21.972 -10.999 +24.266 +01.826 +24.266 -10.799
03=DSI 06 +24.335 -53.866 341.604 +0.000 0000 0 +26.521 -47.539 +22.150 -60.192 +24.335 -47.739 +24.335 -59.992
04=DSI 06 -21.628 -29.150 006.320 +0.000 0000 0 -19.926 -26.553 -23.331 -31.748 -21.628 -26.753 -21.628 -31.548
20230222.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 →

2023/20230222_op · OP · 2 frames · 42.9 MB · 08:48:13–08:54:22 UT

08:54:22 UT · 30 ms 08:48:13 UT · 30 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.