Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 26 January 2025

‹ 24.01.2025 2025 27.01.2025 ›

Photosphere sunspot drawing and RDS evaluation

26.01.2025 photosphere drawing

High-resolution scan (3231 px)

Time
08:00 UT
Observer
Ergün EGE
g
10
f
31
R
131
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HR_ – 1Group 1 · HR_ – 1 Group 2 · DSO – 4Group 2 · DSO – 4 Group 3 · ?__ – 3Group 3 · ?__ – 3 Group 4 · CRO – 4Group 4 · CRO – 4 Group 5 · EAI – 6Group 5 · EAI – 6 Group 6 · AX_ – 3Group 6 · AX_ – 3 Group 7 · HR_ – 1Group 7 · HR_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=26.01.2025
Saat=08:00
Gözlemci=Ergün EGE
KontrolEden=Burçin TANIK
Durumaçısı=-9.87
Enlemaçısı=-5.59
Boylamaçısı=103.11
Boylamfark=2
GKalite=3
GDurum=H.S
Kuzeyaçısı=-0.4
Sırano=20181
AyRasatNo=17
RasatÖnceki=24.01.2025
RasatSonraki=27.01.2025

[Leke Grupları]
Grupsayısı=10:4:6
LekeSayısı=31:12:19
RölatifSayı=131:52:79
01=HR_ 01 +16.994 +70.876 173.986 -1.000 0000 0 +17.525 +71.660 +16.463 +70.920
02=DSO 04 +13.227 +65.839 168.949 +0.000 0000 0 +14.464 +68.335 +11.990 +63.343 +13.227 +68.135 +13.227 +63.543
03=?__ 03 +12.881 +57.250 160.360 -1.000 0000 0 +13.924 +58.776 +11.838 +55.725
04=CRO 04 +13.393 +05.414 108.524 +0.000 0000 0 +14.184 +07.247 +12.602 +03.582 +13.393 +06.747 +13.393 +04.820
05=EAI 06 -09.489 +78.110 181.121 +0.000 0000 0 -05.989 +84.621 -12.989 +71.400 -09.489 +84.421 -09.489 +71.600
06=AX_ 03 -16.123 +43.340 146.450 -1.000 0000 0 -15.466 +44.106 -16.780 +42.574
07=HR_ 01 -17.182 +39.378 142.488 -1.000 0000 0 -16.848 +39.779 -17.516 +38.976
08=CRO 07 -19.702 +33.622 136.732 +0.000 0000 0 -18.113 +35.474 -21.292 +31.771 -19.702 +35.274 -19.702 +31.971
09=AX_ 01 -05.450 +32.980 135.208 +0.000 0000 0 -04.958 +32.457 -05.942 +31.739 -05.450 +32.839 -05.450 +33.121
10=AX_ 01 -17.280 -84.501 018.609 +0.000 0000 0 -16.529 -81.776 -17.527 -87.226 -17.280 -82.276 -17.280 -86.726
20250126.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 →

2025/20250126_ee · EE · 8 frames · 171.4 MB · 08:07:58–08:18:58 UT

08:07:58 UT · 30 ms 08:17:11 UT · 30 ms 08:14:55 UT · 50 ms 08:13:49 UT · 40 ms 08:17:47 UT · 40 ms 08:18:23 UT · 50 ms 08:18:58 UT · 60 ms · over-exposed 08:16:16 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.