Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 20 December 2024

‹ 19.12.2024 2024 25.12.2024 ›

Photosphere sunspot drawing and RDS evaluation

20.12.2024 photosphere drawing

High-resolution scan (3230 px)

Time
08:40 UT
Observer
Ergün EGE
g
10
f
45
R
145
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · BXO – 3Group 3 · BXO – 3 Group 4 · HA_ – 1Group 4 · HA_ – 1 Group 5 · DSO – 6Group 5 · DSO – 6 Group 6 · BXO – 7Group 6 · BXO – 7 Group 7 · HA_ – 2Group 7 · HA_ – 2 Group 8 · FSC – 8Group 8 · FSC – 8 Group 9 · CSO – 7Group 9 · CSO – 7 Group 10 · EAO – 9Group 10 · EAO – 9
RDS data file (.gzd) 
[Gözlem]
Tarih=20.12.2024
Saat=08:40
Gözlemci=Ergün EGE
KontrolEden=Burçin TANIK
Durumaçısı=7.52
Enlemaçısı=-1.61
Boylamaçısı=230
Boylamfark=2
GKalite=3
GDurum=
Kuzeyaçısı=-0.3
Sırano=20162
AyRasatNo=11
RasatÖnceki=19.12.2024
RasatSonraki=25.12.2024

[Leke Grupları]
Grupsayısı=10:3:7
LekeSayısı=45:5:40
RölatifSayı=145:35:110
01=AX_ 01 +20.350 -13.477 216.523 +0.000 0000 0 +20.797 -13.730 +19.903 -13.881 +20.350 -13.902 +20.350 -13.520
02=AX_ 01 +17.131 -40.900 189.991 +0.000 0000 0 +17.441 -39.557 +16.821 -40.461 +17.131 -40.948 +17.131 -40.852
03=BXO 03 +23.497 -40.660 189.934 +0.000 0000 0 +23.913 -38.224 +23.810 -41.907 +23.497 -39.319 +23.497 -42.100
04=HA_ 01 -21.297 +80.433 310.433 +0.000 0000 0 -20.278 +80.738 -22.317 +80.128 -21.297 +80.238 -21.297 +80.628
05=DSO 06 -19.332 +56.598 286.598 +0.000 0000 0 -17.164 +61.458 -21.500 +51.737 -19.332 +61.258 -19.332 +51.937
06=BXO 07 -22.234 +26.511 256.511 +0.000 0000 0 -21.114 +28.844 -23.354 +24.178 -22.234 +28.644 -22.234 +24.378
07=HA_ 02 -20.158 -13.527 216.473 +0.000 0000 0 -19.370 -12.590 -21.280 -14.994 -20.158 -12.825 -20.158 -14.229
08=FSC 08 -08.639 -55.195 174.805 +0.000 0000 0 -07.195 -47.121 -10.840 -63.269 -08.639 -47.321 -08.639 -63.690
09=CSO 07 -14.167 -56.450 173.550 +0.000 0000 0 -11.523 -51.744 -16.810 -61.157 -14.167 -51.944 -14.167 -60.957
10=EAO 09 -16.964 -76.385 153.615 +0.000 0000 0 -14.939 -68.725 -18.988 -84.450 -16.964 -68.925 -16.964 -83.845
20241220.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 →

2024/20241220_ee · EE · 5 frames · 107.1 MB · 08:50:54–08:55:40 UT

08:50:54 UT · 30 ms 08:55:40 UT · 30 ms 08:52:39 UT · 40 ms 08:53:54 UT · 50 ms 08:55:01 UT · 60 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.