Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 14 February 2025

‹ 13.02.2025 2025 20.02.2025 ›

Photosphere sunspot drawing and RDS evaluation

14.02.2025 photosphere drawing

High-resolution scan (3230 px)

Time
07:25 UT
Observer
Ergün EGE
g
8
f
38
R
118
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · HS_ – 2Group 2 · HS_ – 2 Group 3 · HA_ – 1Group 3 · HA_ – 1 Group 4 · EAI – 17Group 4 · EAI – 17 Group 5 · CAO – 4Group 5 · CAO – 4 Group 6 · DRO – 6Group 6 · DRO – 6 Group 7 · DKO – 6Group 7 · DKO – 6 Group 8 · AX_ – 1Group 8 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=14.02.2025
Saat=07:25
Gözlemci=Ergün EGE
KontrolEden=Süleyman FİŞEK
Durumaçısı=-17.21
Enlemaçısı=-6.8
Boylamaçısı=213.26
Boylamfark=3
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.5
Sırano=20190
AyRasatNo=5
RasatÖnceki=13.02.2025
RasatSonraki=20.02.2025

[Leke Grupları]
Grupsayısı=8:3:5
LekeSayısı=38:4:34
RölatifSayı=118:34:84
01=HS_ 01 +05.357 +38.475 251.735 +0.000 0000 0 +06.511 +39.780 +04.202 +37.169 +05.357 +39.280 +05.357 +37.669
02=HS_ 02 +17.456 -11.358 201.902 +0.000 0000 0 +18.628 -09.333 +16.284 -13.382 +17.456 -09.833 +17.456 -12.882
03=HA_ 01 +14.251 -72.822 140.438 +0.000 0000 0 +15.553 -71.970 +12.950 -73.674 +14.251 -72.470 +14.251 -73.174
04=EAI 17 -07.338 +28.689 241.949 +0.000 0000 0 -05.783 +34.164 -08.892 +23.215 -07.338 +33.964 -07.338 +23.415
05=CAO 04 -22.576 +18.782 232.420 +0.000 0000 0 -21.153 +20.619 -23.998 +16.945 -22.576 +20.419 -22.576 +17.145
06=DRO 06 -19.895 -06.634 206.626 +0.000 0000 0 -18.860 -04.983 -20.930 -08.286 -19.895 -05.183 -19.895 -08.860
07=DKO 06 -10.224 -24.478 188.782 +0.000 0000 0 -07.702 -21.871 -12.746 -27.850 -10.224 -22.710 -10.224 -26.885
08=AX_ 01 -13.600 -41.575 171.685 +0.000 0000 0 -13.244 -41.163 -13.957 -41.987 -13.600 -41.663 -13.600 -41.487
20250214.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 →

2025/20250214_ee · EE · 8 frames · 171.4 MB · 07:51:09–07:57:29 UT

07:55:34 UT · 30 ms 07:54:55 UT · 60 ms 07:52:45 UT · 40 ms 07:51:09 UT · 30 ms 07:53:50 UT · 50 ms 07:56:14 UT · 40 ms 07:56:52 UT · 50 ms 07:57:29 UT · 60 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.