Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 22 April 2023

‹ 21.04.2023 2023 24.04.2023 ›

Photosphere sunspot drawing and RDS evaluation

22.04.2023 photosphere drawing

High-resolution scan (3230 px)

Time
08:30 UT
Observer
Korhan YELKENCİ
g
8
f
33
R
113
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · FHC – 17Group 1 · FHC – 17 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · CAI – 5Group 3 · CAI – 5 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · AX_ – 3Group 5 · AX_ – 3 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · AX_ – 1Group 7 · AX_ – 1 Group 8 · EAI – 4Group 8 · EAI – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=22.04.2023
Saat=08:30
Gözlemci=Korhan YELKENCİ
KontrolEden=Ergün EGE
Durumaçısı=-25.41
Enlemaçısı=-5.04
Boylamaçısı=337.58
Boylamfark=2
GKalite=3
GDurum=-
Kuzeyaçısı=-0.5
Sırano=19696
AyRasatNo=14
RasatÖnceki=21.04.2023
RasatSonraki=24.04.2023

[Leke Grupları]
Grupsayısı=8:2:6
LekeSayısı=33:18:15
RölatifSayı=113:38:75
01=FHC 17 +11.579 +47.158 024.738 15.102 0000 0 +13.952 +55.547 +09.206 +38.769 +13.752 +55.347 +09.406 +38.992
02=AX_ 01 +14.272 -39.783 297.797 -1.000 0000 0 +14.272 -39.783 +14.272 -39.783
03=CAI 05 -19.234 +53.486 031.660 27.500 0000 0 -18.124 +55.435 -20.343 +51.537 -18.324 +55.235 -20.143 +51.737
04=AX_ 01 -22.579 +41.150 018.595 -1.000 0000 0 -22.579 +41.150 -22.579 +41.150
05=AX_ 03 -22.886 +20.964 358.544 +0.000 0000 0 -21.782 +21.479 -23.989 +20.448 -22.886 +20.979 -22.886 +20.949
06=AX_ 01 -33.503 -10.216 327.364 -1.000 0000 0 -33.503 -10.216 -33.503 -10.216
07=AX_ 01 -09.238 -11.214 326.366 -1.000 0000 0 -09.238 -11.214 -09.238 -11.214
08=EAI 04 -17.813 -69.984 267.596 09.651 0000 0 -16.568 -63.588 -19.580 -76.380 -16.768 -63.788 -18.858 -76.180
20230422.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 →

2023/20230422_ky · KY · 15 frames · 321.4 MB · 09:04:09–09:11:09 UT

09:09:09 UT · 30 ms 09:05:10 UT · 30 ms 09:04:40 UT · 50 ms · over-exposed 09:08:39 UT · 50 ms · over-exposed 09:04:09 UT · 60 ms · over-exposed 09:08:09 UT · 60 ms · over-exposed 09:11:09 UT 09:09:39 UT · 60 ms 09:10:09 UT · 50 ms 09:10:39 UT · 30 ms 09:07:39 UT 09:05:40 UT · 60 ms 09:06:10 UT · 50 ms 09:06:40 UT · 30 ms 09:07:09 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.