Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 25 August 2023

‹ 24.08.2023 2023 26.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

25.08.2023 photosphere drawing

High-resolution scan (3222 px)

Time
09:45 UT
Observer
Başar COŞKUNOĞLU
g
6
f
24
R
84
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 4Group 1 · HS_ – 4 Group 2 · HS_ – 2Group 2 · HS_ – 2 Group 3 · HS_ – 2Group 3 · HS_ – 2 Group 4 · CHI – 10Group 4 · CHI – 10 Group 5 · DSO – 5Group 5 · DSO – 5 Group 6 · AX_ – 1Group 6 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=25.08.2023
Saat=09:45
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Ergün EGE
Durumaçısı=19.16
Enlemaçısı=7.03
Boylamaçısı=123.44
Boylamfark=1
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.4
Sırano=19802
AyRasatNo=23
RasatÖnceki=24.08.2023
RasatSonraki=26.08.2023

[Leke Grupları]
Grupsayısı=6:4:2
LekeSayısı=24:18:6
RölatifSayı=84:58:26
01=HS_ 04 +10.485 +64.530 187.970 +0.000 0000 0 +12.176 +67.196 +08.793 +61.864 +10.485 +66.696 +10.485 +62.364
02=HS_ 02 +14.589 +46.493 169.933 +0.000 0000 0 +15.338 +47.438 +13.840 +45.548 +14.589 +46.938 +14.589 +46.480
03=HS_ 02 +31.544 +10.336 133.776 +0.000 0000 0 +32.207 +11.359 +30.881 +09.313 +31.544 +10.859 +31.544 +09.813
04=CHI 10 +12.348 -25.209 098.231 84.827 0000 0 +15.570 -22.276 +09.125 -28.143 +13.333 -25.382 +10.394 -25.648
05=DSO 05 -09.196 -44.901 078.539 +0.000 0000 0 -07.206 -42.681 -11.186 -47.120 -09.196 -42.881 -09.196 -46.920
06=AX_ 01 -20.190 -82.534 040.906 -1.000 0000 0 -20.190 -82.534 -20.190 -82.534
20230825.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 →

2023/20230825_bc · BC · 6 frames · 128.6 MB · 09:57:59–10:01:36 UT

10:01:36 UT · 40 ms 10:00:15 UT · 40 ms 10:00:52 UT · 40 ms 09:59:38 UT · 60 ms · over-exposed 09:59:02 UT · 60 ms · over-exposed 09:57:59 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.