Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 5 May 2025

‹ 04.05.2025 2025 06.05.2025 ›

Photosphere sunspot drawing and RDS evaluation

05.05.2025 photosphere drawing

High-resolution scan (3229 px)

Time
07:40 UT
Observer
Süleyman FİŞEK
g
6
f
64
R
124
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · AX_ – 2Group 3 · AX_ – 2 Group 4 · FKC – 41Group 4 · FKC – 41 Group 5 · DSI – 8Group 5 · DSI – 8 Group 6 · CSI – 11Group 6 · CSI – 11
RDS data file (.gzd) 
[Gözlem]
Tarih=5.05.2025
Saat=07:40
Gözlemci=Süleyman FİŞEK
KontrolEden=Süleyman FİŞEK
Durumaçısı=-23.24
Enlemaçısı=-3.73
Boylamaçısı=237.93
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.6
Sırano=20237
AyRasatNo=3
RasatÖnceki=04.05.2025
RasatSonraki=06.05.2025

[Leke Grupları]
Grupsayısı=6:5:1
LekeSayısı=64:53:11
RölatifSayı=124:103:21
01=HS_ 01 +05.386 +65.700 303.630 +0.000 0000 0 +06.429 +66.729 +04.343 +64.670 +05.386 +66.229 +05.386 +65.170
02=AX_ 01 +12.303 +27.383 265.313 -1.000 0000 0 +12.303 +27.383 +12.303 +27.383
03=AX_ 02 +17.143 +12.884 250.814 +0.000 0000 0 +17.392 +14.110 +16.893 +11.657 +17.143 +13.611 +17.143 +12.157
04=FKC 41 +07.945 -00.470 237.460 +0.000 0000 0 +13.436 +07.737 +02.453 -08.677 +07.945 +07.537 +07.945 -08.477
05=DSI 08 +06.428 -26.973 210.957 +0.000 0000 0 +07.379 -23.916 +05.477 -30.310 +06.428 -24.116 +06.428 -29.831
06=CSI 11 -10.811 -57.442 180.488 +0.000 0000 0 -09.298 -53.139 -12.324 -61.745 -10.811 -53.339 -10.811 -61.545
20250505.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 →

2025/20250505_sf · SF · 6 frames · 128.6 MB · 07:45:16–07:54:24 UT

07:48:32 UT · 30 ms 07:52:05 UT · 30 ms 07:45:16 UT · 30 ms 07:51:17 UT · 60 ms · over-exposed 07:54:24 UT · 60 ms · over-exposed 07:46:46 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.