Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 20 July 2023

‹ 19.07.2023 2023 21.07.2023 ›

Photosphere sunspot drawing and RDS evaluation

20.07.2023 photosphere drawing

High-resolution scan (3228 px)

Time
07:30 UT
Observer
Burçin TANIK
g
7
f
106
R
176
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · FHC – 22Group 1 · FHC – 22 Group 2 · EKC – 35Group 2 · EKC – 35 Group 3 · CSI – 21Group 3 · CSI – 21 Group 4 · HR_ – 1Group 4 · HR_ – 1 Group 5 · CHI – 7Group 5 · CHI – 7 Group 6 · CRI – 13Group 6 · CRI – 13 Group 7 · DHI – 7Group 7 · DHI – 7
RDS data file (.gzd) 
[Gözlem]
Tarih=20.07.2023
Saat=07:30
Gözlemci=Burçin TANIK
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=5.81
Enlemaçısı=4.78
Boylamaçısı=240.69
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.5
Sırano=19768
AyRasatNo=19
RasatÖnceki=19.07.2023
RasatSonraki=21.07.2023

[Leke Grupları]
Grupsayısı=7:5:2
LekeSayısı=106:86:20
RölatifSayı=176:136:40
01=FHC 22 +24.570 +26.264 266.954 12.877 0000 0 +27.393 +34.946 +20.721 +17.583 +22.463 +32.827 +25.640 +18.774
02=EKC 35 +07.804 +04.460 245.150 18.673 0000 0 +11.810 +11.931 +04.527 -03.100 +05.151 +10.890 +09.458 -01.986
03=CSI 21 +23.971 -13.819 226.871 49.129 0000 0 +27.343 -10.630 +20.599 -17.800 +22.815 -12.930 +26.607 -15.381
04=HR_ 01 +18.829 -69.833 170.857 +0.000 0000 0 +19.287 -68.902 +18.371 -70.765 +18.829 -69.401 +18.829 -70.265
05=CHI 07 +14.215 -72.637 168.530 12.812 0000 0 +16.763 -63.465 +11.668 -81.808 +13.500 -65.534 +15.433 -76.770
06=CRI 13 -25.915 -10.509 230.181 +0.000 0000 0 -24.875 -06.000 -26.956 -15.180 -25.915 -06.200 -25.915 -14.818
07=DHI 07 -08.886 -44.410 196.280 11.290 0000 0 -07.198 -40.159 -10.574 -48.662 -08.258 -41.492 -09.479 -47.769
20230720.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 →

2023/20230720_bto · BTO · 7 frames · 150.0 MB · 07:30:12–07:37:27 UT

07:37:27 UT · 30 ms 07:32:31 UT · 30 ms 07:35:01 UT · 20 ms 07:30:12 UT · 30 ms 07:33:47 UT · 70 ms · over-exposed 07:31:25 UT · 70 ms · over-exposed 07:36:04 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.