Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 20 August 2023

‹ 19.08.2023 2023 21.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

20.08.2023 photosphere drawing

High-resolution scan (3229 px)

Time
09:40 UT
Observer
Hikmet ÇAKMAK
g
8
f
23
R
103
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · CAI – 6Group 2 · CAI – 6 Group 3 · CSO – 2Group 3 · CSO – 2 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · DAI – 9Group 6 · DAI – 9 Group 7 · AX_ – 1Group 7 · AX_ – 1 Group 8 · AX_ – 2Group 8 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=20.08.2023
Saat=09:40
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Ergün EGE
Durumaçısı=17.64
Enlemaçısı=6.85
Boylamaçısı=189.56
Boylamfark=1
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.3
Sırano=19797
AyRasatNo=18
RasatÖnceki=19.08.2023
RasatSonraki=21.08.2023

[Leke Grupları]
Grupsayısı=8:5:3
LekeSayısı=23:11:12
RölatifSayı=103:61:42
01=AX_ 01 +22.236 +58.186 247.746 -1.000 0000 0 +22.236 +58.186 +22.236 +58.186
02=CAI 06 +25.837 +52.681 242.241 08.526 0000 0 +27.850 +56.908 +24.590 +48.453 +25.373 +56.390 +26.396 +49.200
03=CSO 02 +10.417 -05.232 184.328 05.791 0000 0 +11.553 -01.574 +09.281 -08.889 +10.240 -02.326 +10.879 -08.647
04=HS_ 01 +13.331 -19.512 170.480 +0.000 0000 0 +14.212 -18.702 +12.450 -20.323 +13.331 -19.201 +13.331 -19.822
05=HS_ 01 +30.464 -54.819 134.741 +0.000 0000 0 +31.237 -53.914 +29.691 -55.724 +30.464 -54.414 +30.464 -55.224
06=DAI 09 -18.820 +34.585 224.145 15.621 0000 0 -16.657 +37.776 -19.508 +31.393 -18.721 +36.867 -17.393 +32.113
07=AX_ 01 -09.360 +09.539 199.990 -1.000 0000 0 -09.360 +09.539 -09.360 +09.539
08=AX_ 02 -09.589 -55.804 133.756 +0.000 0000 0 -08.934 -55.363 -10.244 -56.245 -09.589 -55.863 -09.589 -55.745
20230820.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 →

2023/20230820_hc · HC · 6 frames · 128.6 MB · 09:42:18–10:16:32 UT

09:42:18 UT · 30 ms 10:12:02 UT · 30 ms 09:58:07 UT · 30 ms 09:44:23 UT · 60 ms · over-exposed 09:59:08 UT · 60 ms · over-exposed 10:16:32 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.