Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 1 March 2025

‹ 27.02.2025 2025 02.03.2025 ›

Photosphere sunspot drawing and RDS evaluation

01.03.2025 photosphere drawing

High-resolution scan (3224 px)

Time
12:35 UT
Observer
Olcay PLEVNE
g
8
f
37
R
117
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 2Group 1 · BXI – 2 Group 2 · CKI – 13Group 2 · CKI – 13 Group 3 · AX_ – 1Group 3 · AX_ – 1 Group 4 · CSI – 8Group 4 · CSI – 8 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · BXI – 3Group 6 · BXI – 3 Group 7 · CAI – 7Group 7 · CAI – 7
RDS data file (.gzd) 
[Gözlem]
Tarih=1.03.2025
Saat=12:35
Gözlemci=Olcay PLEVNE
KontrolEden=Burçin TANIK
Durumaçısı=-21.68
Enlemaçısı=-7.22
Boylamaçısı=12.88
Boylamfark=0
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=20197
AyRasatNo=1
RasatÖnceki=27.02.2025
RasatSonraki=02.03.2025

[Leke Grupları]
Grupsayısı=8:6:2
LekeSayısı=37:28:9
RölatifSayı=117:88:29
01=BXI 02 +15.511 +56.739 069.619 +0.000 0000 0 +16.265 +58.382 +14.758 +55.970 +15.511 +57.445 +15.511 +56.330
02=CKI 13 +19.990 +06.418 019.298 22.542 0000 0 +22.745 +14.403 +15.452 -01.567 +16.707 +12.639 +21.290 +02.147
03=AX_ 01 +17.450 -03.394 009.486 -1.000 0000 0 +17.450 -03.394 +17.450 -03.394
04=CSI 08 +11.535 -13.564 359.316 +0.000 0000 0 +13.368 -10.303 +09.701 -16.824 +11.535 -10.503 +11.535 -16.624
05=AX_ 01 +05.263 -19.895 352.985 -1.000 0000 0 +05.263 -19.895 +05.263 -19.895
06=BXI 03 +23.611 -26.403 346.477 +0.000 0000 0 +24.937 -22.933 +22.285 -29.872 +23.611 -23.133 +23.611 -29.672
07=CAI 07 -10.749 +08.212 021.920 +0.000 0000 0 -09.285 +10.500 -12.212 +06.419 -10.749 +09.805 -10.749 +06.619
08=BXI 02 -14.953 +06.971 019.851 +0.000 0000 0 -14.389 +07.969 -15.517 +05.974 -14.953 +07.469 -14.953 +06.474
20250301.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 →

2025/20250301_op · OP · 4 frames · 85.7 MB · 12:48:10–12:52:31 UT

12:48:10 UT · 30 ms 12:50:30 UT · 30 ms 12:52:31 UT · 60 ms · over-exposed 12:51:41 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.