Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 1 January 2025

‹ 30.12.2024 2025 02.01.2025 ›

Photosphere sunspot drawing and RDS evaluation

01.01.2025 photosphere drawing

High-resolution scan (3230 px)

Time
11:20 UT
Observer
Ergün EGE
g
12
f
87
R
207
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · EAC – 6Group 1 · EAC – 6 Group 2 · CSO – 9Group 2 · CSO – 9 Group 3 · AX_ – 1Group 3 · AX_ – 1 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · DSO – 5Group 6 · DSO – 5 Group 7 · CAI – 10Group 7 · CAI – 10 Group 8 · ESC – 21Group 8 · ESC – 21 Group 9 · DAI – 17Group 9 · DAI – 17 Group 10 · CAO – 8Group 10 · CAO – 8 Group 11 · DAO – 6Group 11 · DAO – 6 Group 12 · CRO – 2Group 12 · CRO – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=1.01.2025
Saat=11:20
Gözlemci=Ergün EGE
KontrolEden=Süleyman FİŞEK
Durumaçısı=1.71
Enlemaçısı=-3.08
Boylamaçısı=70.48
Boylamfark=0
GKalite=3
GDurum=
Kuzeyaçısı=0.0
Sırano=20165
AyRasatNo=1
RasatÖnceki=30.12.2024
RasatSonraki=02.01.2025

[Leke Grupları]
Grupsayısı=12:3:9
LekeSayısı=87:16:71
RölatifSayı=207:46:161
01=EAC 06 +12.540 +78.146 148.626 +0.000 0000 0 +14.101 +85.777 +10.979 +70.515 +12.540 +85.577 +12.540 +70.715
02=CSO 09 +19.301 +31.520 102.000 +0.000 0000 0 +21.456 +35.599 +17.146 +27.442 +19.301 +35.399 +19.301 +27.642
03=AX_ 01 +22.558 +21.642 092.122 +0.000 0000 0 +23.800 +22.680 +22.109 +21.215 +22.558 +21.875 +22.558 +21.410
04=HS_ 01 -19.480 +55.787 126.267 +0.000 0000 0 -18.600 +56.541 -20.350 +55.340 -19.480 +55.887 -19.480 +55.687
05=AX_ 01 -11.898 +45.349 115.829 +0.000 0000 0 -11.536 +45.878 -12.260 +44.820 -11.898 +45.378 -11.898 +45.320
06=DSO 05 -12.268 +31.997 102.477 +0.000 0000 0 -11.321 +33.795 -13.214 +30.199 -12.268 +33.595 -12.268 +30.399
07=CAI 10 -17.324 +11.670 081.547 +0.000 0000 0 -15.582 +13.995 -19.660 +08.139 -17.324 +13.795 -17.324 +08.339
08=ESC 21 -05.858 +04.432 074.912 +0.000 0000 0 -04.279 +10.990 -07.437 -02.125 -05.858 +10.790 -05.858 -01.925
09=DAI 17 -13.490 -26.299 044.181 +0.000 0000 0 -11.211 -22.800 -15.770 -30.591 -13.490 -22.208 -13.490 -30.391
10=CAO 08 -14.926 -55.914 014.566 +0.000 0000 0 -12.150 -52.344 -17.838 -59.485 -14.926 -52.544 -14.926 -59.285
11=DAO 06 -08.540 -65.721 004.759 +0.000 0000 0 -06.355 -61.958 -10.726 -69.484 -08.540 -62.158 -08.540 -69.284
12=CRO 02 -12.853 -73.793 356.687 +0.000 0000 0 -11.628 -72.263 -14.790 -75.322 -12.853 -72.463 -12.853 -75.122
20250101.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 →

2025/20250101_ee · EE · 8 frames · 171.4 MB · 11:37:08–11:50:58 UT

11:41:15 UT · 40 ms 11:49:16 UT · 30 ms 11:49:51 UT · 40 ms 11:50:58 UT · 60 ms 11:50:24 UT · 50 ms 11:47:08 UT · 50 ms 11:48:40 UT · 60 ms 11:37:08 UT · 30 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.