Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 29 April 2025

‹ 28.04.2025 2025 30.04.2025 ›

Photosphere sunspot drawing and RDS evaluation

29.04.2025 photosphere drawing

High-resolution scan (3230 px)

Time
08:40 UT
Observer
Süleyman FİŞEK
g
7
f
21
R
91
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 4Group 1 · BXI – 4 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · EKC – 3Group 3 · EKC – 3 Group 4 · BXO – 1Group 4 · BXO – 1 Group 5 · DSC – 6Group 5 · DSC – 6 Group 6 · BXI – 5Group 6 · BXI – 5 Group 7 · AX_ – 1Group 7 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=29.04.2025
Saat=08:40
Gözlemci=Süleyman FİŞEK
KontrolEden=Burçin TANIK
Durumaçısı=-24.36
Enlemaçısı=-4.34
Boylamaçısı=316.68
Boylamfark=2
GKalite=3
GDurum=B.A , K.T
Kuzeyaçısı=-0.6
Sırano=20233
AyRasatNo=17
RasatÖnceki=28.04.2025
RasatSonraki=30.04.2025

[Leke Grupları]
Grupsayısı=7:3:4
LekeSayısı=21:8:13
RölatifSayı=91:38:53
01=BXI 04 +15.315 +48.820 005.500 +0.000 0000 0 +16.830 +51.200 +14.547 +46.621 +15.315 +50.610 +15.315 +47.300
02=HS_ 01 +05.165 -13.737 302.943 +0.000 0000 0 +06.310 -12.615 +04.210 -14.859 +05.165 -13.115 +05.165 -14.359
03=EKC 03 +08.276 -77.611 239.680 +0.000 0000 0 +11.791 -70.360 +04.761 -84.863 +08.276 -70.560 +08.276 -84.663
04=BXO 01 -32.454 +79.551 036.231 +0.000 0000 0 -31.789 +81.587 -33.119 +77.514 -32.454 +81.880 -32.454 +78.150
05=DSC 06 -12.388 +46.472 003.152 +0.000 0000 0 -10.854 +51.260 -13.923 +41.684 -12.388 +51.600 -12.388 +41.884
06=BXI 05 -18.951 +06.583 323.263 +0.000 0000 0 -16.993 +08.167 -20.908 +04.998 -18.951 +07.967 -18.951 +05.198
07=AX_ 01 -16.243 -14.490 302.190 +0.000 0000 0 -15.873 -14.129 -16.613 -14.851 -16.243 -14.629 -16.243 -14.351
20250429.gzd

Chromosphere (H-α) FITS frames

No chromosphere observation for this day.

Coronado H-α animations from frame sequences

No Coronado observation for this day.