Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 10 January 2025

‹ 09.01.2025 2025 17.01.2025 ›

Photosphere sunspot drawing and RDS evaluation

10.01.2025 photosphere drawing

High-resolution scan (3230 px)

Time
09:50 UT
Observer
Ergün EGE
g
9
f
51
R
141
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 2Group 1 · AX_ – 2 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · DAI – 11Group 3 · DAI – 11 Group 4 · DSI – 18Group 4 · DSI – 18 Group 5 · DAI – 9Group 5 · DAI – 9 Group 6 · AX_ – 2Group 6 · AX_ – 2 Group 7 · AX_ – 2Group 7 · AX_ – 2 Group 8 · CRO – 2Group 8 · CRO – 2 Group 9 · AX_ – 4Group 9 · AX_ – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=10.01.2025
Saat=09:50
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=-2.6
Enlemaçısı=-4.08
Boylamaçısı=312.78
Boylamfark=1
GKalite=3
GDurum=H.S
Kuzeyaçısı=-0.4
Sırano=20173
AyRasatNo=9
RasatÖnceki=09.01.2025
RasatSonraki=17.01.2025

[Leke Grupları]
Grupsayısı=9:5:4
LekeSayısı=51:41:10
RölatifSayı=141:91:50
01=AX_ 02 +24.298 +63.870 016.650 +0.000 0000 0 +25.172 +65.162 +23.423 +62.578 +00.000 +00.000 +00.000 +00.000
02=AX_ 01 +13.523 +57.462 010.242 +0.000 0000 0 +13.799 +57.876 +13.247 +57.480 +13.523 +57.160 +13.523 +57.764
03=DAI 11 +20.300 +35.434 348.214 +0.000 0000 0 +22.368 +39.600 +18.232 +31.808 +20.300 +38.860 +20.300 +32.800
04=DSI 18 +10.353 +26.684 339.464 +0.000 0000 0 +11.999 +33.123 +08.707 +20.245 +10.353 +32.923 +10.353 +20.445
05=DAI 09 +06.361 -33.816 278.964 +0.000 0000 0 +08.930 -30.746 +04.630 -36.886 +06.361 -30.946 +06.361 -36.686
06=AX_ 02 -09.110 +49.280 002.600 +0.000 0000 0 -08.637 +49.969 -09.584 +48.590 -09.110 +49.469 -09.110 +49.900
07=AX_ 02 -14.848 +42.880 355.660 +0.000 0000 0 -14.538 +43.688 -15.158 +42.730 -14.848 +42.859 -14.848 +42.901
08=CRO 02 -32.344 +42.277 355.570 +0.000 0000 0 -31.793 +44.721 -32.896 +39.833 -32.344 +44.221 -32.344 +40.333
09=AX_ 04 -18.834 +08.784 321.564 +0.000 0000 0 -18.262 +10.277 -19.406 +07.291 -18.834 +09.777 -18.834 +07.791
20250110.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 →

2025/20250110_ee · EE · 8 frames · 171.4 MB · 09:51:36–10:04:10 UT

10:02:08 UT · 30 ms 10:03:01 UT · 40 ms 09:51:36 UT · 30 ms 10:03:35 UT · 50 ms 09:53:27 UT · 40 ms 09:56:47 UT · 50 ms 09:57:59 UT · 60 ms · over-exposed 10:04:10 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.