Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 21 July 2023

‹ 20.07.2023 2023 22.07.2023 ›

Photosphere sunspot drawing and RDS evaluation

21.07.2023 photosphere drawing

High-resolution scan (3230 px)

Time
07:15 UT
Observer
Hikmet ÇAKMAK
g
8
f
62
R
142
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · FKO – 15Group 1 · FKO – 15 Group 2 · EAC – 20Group 2 · EAC – 20 Group 3 · CSI – 9Group 3 · CSI – 9 Group 4 · HA_ – 1Group 4 · HA_ – 1 Group 5 · CAI – 6Group 5 · CAI – 6 Group 6 · CAO – 6Group 6 · CAO – 6 Group 7 · CAI – 4Group 7 · CAI – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=21.07.2023
Saat=07:15
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Ergün EGE
Durumaçısı=6.23
Enlemaçısı=4.86
Boylamaçısı=227.6
Boylamfark=3
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.5
Sırano=19769
AyRasatNo=20
RasatÖnceki=20.07.2023
RasatSonraki=22.07.2023

[Leke Grupları]
Grupsayısı=8:5:3
LekeSayısı=62:51:11
RölatifSayı=142:101:41
01=FKO 15 +23.446 +39.370 266.970 13.488 0000 0 +26.383 +47.856 +20.509 +30.883 +22.300 +45.822 +25.293 +31.959
02=EAC 20 +08.800 +18.198 245.798 22.734 0000 0 +11.285 +25.240 +04.876 +11.157 +06.420 +20.619 +09.746 +11.729
03=CSI 09 +24.349 -00.588 227.120 38.826 0000 0 +27.161 +02.387 +21.537 -03.564 +22.913 +01.237 +26.362 -03.590
04=HA_ 01 +18.941 -57.372 170.228 +0.000 0000 0 +19.518 -56.553 +18.364 -58.191 +18.941 -57.530 +18.941 -57.691
05=CAI 06 +14.713 -60.492 167.108 04.579 0000 0 +17.118 -51.295 +12.309 -69.688 +14.607 -52.696 +15.672 -66.122
06=CAO 06 -25.589 +02.444 230.440 03.128 0000 0 -24.641 +06.799 -26.537 -01.912 -25.480 +05.918 -25.888 -01.579
07=CAI 04 -08.930 -31.860 196.514 10.605 0000 0 -06.518 -27.660 -09.667 -35.106 -07.614 -27.918 -08.840 -34.484
08=AX_ 01 -41.889 -60.325 167.275 -1.000 0000 0 -41.889 -60.325 -41.889 -60.325
20230721.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 →

2023/20230721_hc · HC · 4 frames · 85.7 MB · 07:16:15–07:48:15 UT

07:16:15 UT · 30 ms 07:40:04 UT · 30 ms 07:48:15 UT · 30 ms 07:19:29 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.