Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 17 August 2023

‹ 16.08.2023 2023 18.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

17.08.2023 photosphere drawing

High-resolution scan (3230 px)

Time
08:00 UT
Observer
Hikmet ÇAKMAK
g
8
f
38
R
118
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXO – 2Group 1 · BXO – 2 Group 2 · BXI – 5Group 2 · BXI – 5 Group 3 · DAI – 15Group 3 · DAI – 15 Group 4 · EAO – 4Group 4 · EAO – 4 Group 5 · HA_ – 1Group 5 · HA_ – 1 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · DAI – 8Group 7 · DAI – 8 Group 8 · HR_ – 2Group 8 · HR_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=17.08.2023
Saat=08:00
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Korhan YELKENCİ
Durumaçısı=16.65
Enlemaçısı=6.72
Boylamaçısı=230.13
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.5
Sırano=19794
AyRasatNo=15
RasatÖnceki=16.08.2023
RasatSonraki=18.08.2023

[Leke Grupları]
Grupsayısı=8:5:3
LekeSayısı=38:27:11
RölatifSayı=118:77:41
01=BXO 02 +19.869 +74.709 304.839 19.638 0000 0 +21.429 +79.165 +18.309 +70.254 +21.190 +77.532 +18.740 +71.130
02=BXI 05 +20.828 +20.107 250.237 15.619 0000 0 +22.715 +21.961 +18.940 +18.253 +20.516 +21.458 +19.693 +18.513
03=DAI 15 +26.408 +11.533 241.663 12.589 0000 0 +28.257 +16.259 +24.559 +06.807 +25.711 +15.970 +27.425 +07.395
04=EAO 04 +10.605 -47.411 182.719 04.960 0000 0 +11.798 -41.346 +09.412 -53.476 +10.960 -42.360 +10.520 -52.874
05=HA_ 01 +13.200 -59.635 170.495 +0.000 0000 0 +13.825 -58.791 +12.178 -60.480 +13.200 -59.290 +13.200 -59.979
06=AX_ 01 -17.679 +08.801 238.931 -1.000 0000 0 -17.679 +08.801 -17.679 +08.801
07=DAI 08 -17.146 -05.953 224.177 09.147 0000 0 -15.261 -02.569 -19.320 -09.337 -17.817 -03.487 -16.990 -08.632
08=HR_ 02 -08.303 -31.312 198.818 +0.000 0000 0 -07.566 -30.318 -09.400 -32.306 -08.303 -30.818 -08.303 -31.806
20230817.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 →

2023/20230817_hc · HC · 5 frames · 107.1 MB · 08:07:17–08:56:42 UT

08:08:57 UT · 60 ms 08:51:45 UT · 30 ms 08:07:17 UT · 30 ms 08:56:42 UT · 30 ms 08:48:20 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.