Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 22 March 2025

‹ 21.03.2025 2025 23.03.2025 ›

Photosphere sunspot drawing and RDS evaluation

22.03.2025 photosphere drawing

High-resolution scan (3230 px)

Time
06:35 UT
Observer
Süleyman FİŞEK
g
12
f
50
R
170
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CHI – 5Group 1 · CHI – 5 Group 2 · DKC – 13Group 2 · DKC – 13 Group 3 · BXI – 6Group 3 · BXI – 6 Group 4 · DSO – 6Group 4 · DSO – 6 Group 5 · AX_ – 3Group 5 · AX_ – 3 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · HH_ – 1Group 7 · HH_ – 1 Group 8 · BXI – 8Group 8 · BXI – 8 Group 9 · HS_ – 1Group 9 · HS_ – 1 Group 10 · AX_ – 3Group 10 · AX_ – 3 Group 11 · BXO – 2Group 11 · BXO – 2 Group 12 · HS_ – 1Group 12 · HS_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=22.03.2025
Saat=06:35
Gözlemci=Süleyman FİŞEK
KontrolEden=Ergün EGE
Durumaçısı=-25.41
Enlemaçısı=-6.98
Boylamaçısı=99.42
Boylamfark=3
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.7
Sırano=20212
AyRasatNo=16
RasatÖnceki=21.03.2025
RasatSonraki=23.03.2025

[Leke Grupları]
Grupsayısı=12:6:6
LekeSayısı=50:34:16
RölatifSayı=170:94:76
01=CHI 05 +15.659 +67.891 167.311 +0.000 0000 0 +17.262 +71.604 +14.560 +64.177 +15.659 +71.404 +15.659 +64.377
02=DKC 13 +06.183 +27.910 126.511 +0.000 0000 0 +08.175 +30.504 +04.191 +23.678 +06.183 +30.304 +06.183 +23.878
03=BXI 06 +18.580 +22.399 121.819 +0.000 0000 0 +19.568 +24.968 +17.593 +19.830 +18.580 +24.768 +18.580 +20.300
04=DSO 06 +13.943 -15.681 083.739 +0.000 0000 0 +15.335 -11.129 +12.551 -20.234 +13.943 -11.329 +13.943 -20.340
05=AX_ 03 +08.541 -63.642 035.778 +0.000 0000 0 +09.886 -62.367 +07.196 -64.917 +00.000 +00.000 +00.000 +00.000
06=AX_ 01 +16.247 -74.604 024.816 -1.000 0000 0 +16.247 -74.604 +16.247 -74.604
07=HH_ 01 -05.865 +78.290 177.710 +0.000 0000 0 -04.805 +80.520 -06.925 +76.529 -05.865 +79.785 -05.865 +76.795
08=BXI 08 -16.431 +40.765 140.185 +0.000 0000 0 -15.102 +43.195 -17.759 +38.334 -16.431 +42.995 -16.431 +38.534
09=HS_ 01 -17.972 +27.230 126.650 +0.000 0000 0 -17.140 +28.400 -18.930 +26.600 -17.972 +27.630 -17.972 +26.830
10=AX_ 03 -10.645 +10.970 109.517 +0.000 0000 0 -09.804 +10.720 -11.487 +09.473 -10.645 +11.940 -10.645 +10.847
11=BXO 02 -15.160 -57.918 041.502 +0.000 0000 0 -14.468 -54.544 -15.853 -61.291 -15.160 -55.440 -15.160 -60.792
12=HS_ 01 -08.454 -72.378 027.420 +0.000 0000 0 -07.870 -71.305 -09.390 -73.452 -08.454 -71.804 -08.454 -72.951
20250322.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 →

2025/20250322_sf · SF · 6 frames · 128.6 MB · 06:57:58–07:05:08 UT

07:05:08 UT · 30 ms 07:00:35 UT · 30 ms 07:03:02 UT · 30 ms 07:04:20 UT · 60 ms · over-exposed 06:57:58 UT · 60 ms · over-exposed 07:01:53 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.