Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 21 June 2023

‹ 20.06.2023 2023 22.06.2023 ›

Photosphere sunspot drawing and RDS evaluation

21.06.2023 photosphere drawing

High-resolution scan (3228 px)

Time
07:20 UT
Observer
Olcay PLEVNE
g
13
f
71
R
201
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DSI – 3Group 1 · DSI – 3 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · DSI – 6Group 3 · DSI – 6 Group 4 · AX_ – 2Group 4 · AX_ – 2 Group 5 · BXI – 4Group 5 · BXI – 4 Group 6 · AX_ – 3Group 6 · AX_ – 3 Group 7 · HS_ – 5Group 7 · HS_ – 5 Group 8 · DSI – 8Group 8 · DSI – 8 Group 9 · DAI – 4Group 9 · DAI – 4 Group 10 · EKI – 21Group 10 · EKI – 21 Group 11 · HK_ – 8Group 11 · HK_ – 8 Group 12 · HS_ – 5Group 12 · HS_ – 5 Group 13 · AX_ – 1Group 13 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=21.06.2023
Saat=07:20
Gözlemci=Olcay PLEVNE
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=-7.18
Enlemaçısı=1.7
Boylamaçısı=264.6
Boylamfark=3
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19741
AyRasatNo=19
RasatÖnceki=20.06.2023
RasatSonraki=22.06.2023

[Leke Grupları]
Grupsayısı=13:7:6
LekeSayısı=71:24:47
RölatifSayı=201:94:107
01=DSI 03 +22.514 +49.683 314.283 +0.000 0000 0 +23.990 +53.871 +21.370 +45.494 +22.514 +53.671 +22.514 +45.694
02=HS_ 01 +10.602 +00.891 265.491 +0.000 0000 0 +11.361 +01.513 +09.843 +00.270 +10.602 +01.130 +10.602 +00.769
03=DSI 06 +20.928 -28.619 235.981 +0.000 0000 0 +22.448 -26.400 +19.407 -30.837 +20.928 -26.600 +20.928 -30.637
04=AX_ 02 +15.844 -29.589 235.110 +0.000 0000 0 +17.880 -28.155 +13.808 -31.240 +00.000 +00.000 +00.000 +00.000
05=BXI 04 +07.586 -32.777 231.823 +0.000 0000 0 +08.626 -31.850 +06.546 -34.469 +07.586 -31.285 +07.586 -34.269
06=AX_ 03 +22.000 -34.590 230.100 +0.000 0000 0 +22.656 -33.451 +21.345 -35.729 +22.000 -33.951 +22.000 -35.229
07=HS_ 05 +08.530 -56.697 207.903 +0.000 0000 0 +09.375 -53.504 +07.686 -59.889 +08.530 -54.400 +08.530 -59.389
08=DSI 08 -22.681 +76.474 341.740 +0.000 0000 0 -20.596 +81.991 -24.766 +70.957 -22.681 +81.791 -22.681 +71.157
09=DAI 04 -11.460 +49.356 313.956 +0.000 0000 0 -09.400 +52.897 -13.880 +45.815 -11.460 +52.697 -11.460 +46.150
10=EKI 21 -15.350 +19.370 283.970 +0.000 0000 0 -13.131 +26.506 -16.938 +12.234 -15.350 +26.306 -15.350 +12.434
11=HK_ 08 -20.499 -29.610 234.990 +0.000 0000 0 -18.270 -25.522 -22.728 -33.697 -20.499 -26.230 -20.499 -33.198
12=HS_ 05 -15.493 -58.530 206.700 +0.000 0000 0 -12.152 -54.647 -18.833 -62.414 -15.493 -55.146 -15.493 -61.913
13=AX_ 01 -12.156 -80.227 184.373 -1.000 0000 0 -12.156 -80.227 -12.156 -80.227
20230621.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 →

2023/20230621_op · OP · 4 frames · 85.7 MB · 07:21:58–07:28:13 UT

07:21:58 UT · 40 ms 07:26:10 UT · 40 ms 07:28:13 UT · 60 ms · over-exposed 07:27:35 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.