Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 7 March 2025

‹ 06.03.2025 2025 08.03.2025 ›

Photosphere sunspot drawing and RDS evaluation

07.03.2025 photosphere drawing

High-resolution scan (3231 px)

Time
09:15 UT
Observer
Ergün EGE
g
5
f
32
R
82
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · AX_ – 3Group 2 · AX_ – 3 Group 3 · EHC – 21Group 3 · EHC – 21 Group 4 · AX_ – 5Group 4 · AX_ – 5 Group 5 · HS_ – 2Group 5 · HS_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=7.03.2025
Saat=09:15
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=-23.02
Enlemaçısı=-7.25
Boylamaçısı=295.66
Boylamfark=2
GKalite=3
GDurum=
Kuzeyaçısı=-0.4
Sırano=20201
AyRasatNo=5
RasatÖnceki=06.03.2025
RasatSonraki=08.03.2025

[Leke Grupları]
Grupsayısı=5:1:4
LekeSayısı=32:1:31
RölatifSayı=82:11:71
01=HS_ 01 +06.750 -77.203 218.457 +0.000 0000 0 +06.984 -75.949 +05.167 -78.457 +06.750 -76.449 +06.750 -77.957
02=AX_ 03 -16.433 +10.243 305.903 +0.000 0000 0 -15.978 +11.704 -16.888 +08.781 -16.433 +11.205 -16.433 +09.281
03=EHC 21 -14.364 -01.269 294.391 +0.000 0000 0 -12.640 +05.913 -16.664 -08.451 -14.364 +05.713 -14.364 -08.251
04=AX_ 05 -25.386 -18.246 277.414 +0.000 0000 0 -24.466 -17.377 -26.306 -19.115 +00.000 +00.000 +00.000 +00.000
05=HS_ 02 -20.495 -60.726 234.934 +0.000 0000 0 -19.380 -58.694 -21.609 -62.758 -20.495 -59.194 -20.495 -62.258
20250307.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 →

2025/20250307_ee · EE · 3 frames · 64.3 MB · 09:51:07–10:11:48 UT

10:10:41 UT · 60 ms · over-exposed 09:51:07 UT · 60 ms · over-exposed 10:11:48 UT · 50 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.