Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 8 March 2025

‹ 07.03.2025 2025 09.03.2025 ›

Photosphere sunspot drawing and RDS evaluation

08.03.2025 photosphere drawing

High-resolution scan (3230 px)

Time
09:00 UT
Observer
Ergün EGE
g
5
f
27
R
77
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 2Group 1 · HS_ – 2 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · EHC – 19Group 3 · EHC – 19 Group 4 · AX_ – 3Group 4 · AX_ – 3 Group 5 · HS_ – 2Group 5 · HS_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=8.03.2025
Saat=09:00
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-23.23
Enlemaçısı=-7.25
Boylamaçısı=282.62
Boylamfark=2
GKalite=3
GDurum=B.A , H.S
Kuzeyaçısı=-0.4
Sırano=20202
AyRasatNo=6
RasatÖnceki=07.03.2025
RasatSonraki=09.03.2025

[Leke Grupları]
Grupsayısı=5:1:4
LekeSayısı=27:2:25
RölatifSayı=77:12:65
01=HS_ 02 +05.680 -65.360 217.584 +0.000 0000 0 +06.360 -64.330 +05.000 -66.400 +05.680 -64.825 +05.680 -65.895
02=AX_ 01 -16.655 +24.874 307.494 +0.000 0000 0 -16.311 +25.174 -16.998 +24.573 -16.655 +24.675 -16.655 +25.730
03=EHC 19 -14.249 +12.909 295.529 +0.000 0000 0 -12.134 +20.603 -16.363 +05.216 -14.249 +20.403 -14.249 +05.416
04=AX_ 03 -25.121 -04.744 277.876 +0.000 0000 0 -24.490 -03.820 -25.752 -05.669 -25.121 -04.319 -25.121 -05.168
05=HS_ 02 -20.532 -48.354 234.266 +0.000 0000 0 -19.332 -46.528 -21.732 -50.181 -20.532 -47.280 -20.532 -49.681
20250308.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 →

2025/20250308_ee · EE · 3 frames · 64.3 MB · 09:18:52–09:26:37 UT

09:26:37 UT · 30 ms 09:24:16 UT · 40 ms · over-exposed 09:18:52 UT · 50 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.