Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 26 August 2023

‹ 25.08.2023 2023 27.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

26.08.2023 photosphere drawing

High-resolution scan (3231 px)

Time
10:35 UT
Observer
Ergün EGE
g
6
f
15
R
75
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 1Group 1 · HA_ – 1 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · HS_ – 1Group 3 · HS_ – 1 Group 4 · CAI – 8Group 4 · CAI – 8 Group 5 · CSO – 3Group 5 · CSO – 3 Group 6 · HS_ – 1Group 6 · HS_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=26.08.2023
Saat=10:35
Gözlemci=Ergün EGE
KontrolEden=Olcay PLEVNE
Durumaçısı=19.46
Enlemaçısı=7.06
Boylamaçısı=109.77
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.5
Sırano=19803
AyRasatNo=24
RasatÖnceki=25.08.2023
RasatSonraki=27.08.2023

[Leke Grupları]
Grupsayısı=6:4:2
LekeSayısı=15:11:4
RölatifSayı=75:51:24
01=HA_ 01 +09.925 +78.555 188.325 +0.000 0000 0 +10.551 +81.397 +09.299 +75.712 +09.925 +80.897 +09.925 +76.213
02=HS_ 01 +14.225 +59.378 169.148 +0.000 0000 0 +14.577 +60.467 +13.874 +58.288 +14.225 +59.967 +14.225 +58.788
03=HS_ 01 +30.964 +22.223 131.993 +0.000 0000 0 +31.634 +22.974 +30.295 +21.473 +30.964 +22.473 +30.964 +21.972
04=CAI 08 +11.794 -11.233 098.537 +0.000 0000 0 +15.247 -08.563 +08.341 -13.903 +11.794 -08.763 +11.794 -13.703
05=CSO 03 -09.869 -31.360 078.410 +0.000 0000 0 -08.731 -29.240 -11.700 -33.479 -09.869 -29.440 -09.869 -33.279
06=HS_ 01 -19.396 -63.667 046.103 +0.000 0000 0 -18.856 -62.396 -19.937 -64.938 -19.396 -62.896 -19.396 -64.438
20230826.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 →

2023/20230826_ee · EE · 8 frames · 171.4 MB · 10:38:28–10:53:39 UT

10:39:33 UT · 40 ms 10:38:28 UT · 30 ms 10:52:31 UT · 40 ms 10:51:56 UT · 30 ms 10:40:09 UT · 50 ms · over-exposed 10:53:05 UT · 50 ms · over-exposed 10:40:51 UT · 60 ms · over-exposed 10:53:39 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.