Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 9 February 2024

‹ 08.02.2024 2024 10.02.2024 ›

Photosphere sunspot drawing and RDS evaluation

09.02.2024 photosphere drawing

High-resolution scan (3234 px)

Time
08:45 UT
Observer
H.ÇAKMAK-B.C.
g
6
f
70
R
130
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 2Group 1 · AX_ – 2 Group 2 · AX_ – 2Group 2 · AX_ – 2 Group 3 · CAI – 3Group 3 · CAI – 3 Group 4 · FKC – 61Group 4 · FKC – 61 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · HA_ – 1Group 6 · HA_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=9.02.2024
Saat=08:45
Gözlemci=H.ÇAKMAK-B.C.
KontrolEden=Burçin TANIK
Durumaçısı=-15.2
Enlemaçısı=-6.51
Boylamaçısı=69.1
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.4
Sırano=19916
AyRasatNo=8
RasatÖnceki=08.02.2024
RasatSonraki=10.02.2024

[Leke Grupları]
Grupsayısı=6:2:4
LekeSayısı=70:4:66
RölatifSayı=130:24:106
01=AX_ 02 +20.585 +55.972 125.720 +0.000 0000 0 +20.981 +56.563 +20.189 +55.382 +20.585 +56.620 +20.585 +55.882
02=AX_ 02 +16.000 +22.112 091.212 +0.000 0000 0 +16.546 +22.780 +15.454 +21.443 +16.000 +22.281 +16.000 +21.943
03=CAI 03 -17.289 +30.989 100.890 15.730 0000 0 -16.148 +34.210 -18.430 +27.768 -16.641 +33.290 -17.933 +28.485
04=FKC 61 -14.897 -15.280 053.740 14.935 0000 0 -11.267 -06.407 -18.527 -24.152 -13.448 -08.238 -17.384 -23.186
05=AX_ 01 -10.370 -26.941 042.790 +0.000 0000 0 -09.786 -26.720 -10.289 -27.162 -10.370 -27.220 -10.370 -26.662
06=HA_ 01 -20.349 -66.823 002.277 +0.000 0000 0 -19.472 -65.700 -21.226 -67.945 -20.349 -66.201 -20.349 -67.445
20240209.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 →

2024/20240209_hc · HC · 6 frames · 128.6 MB · 08:44:49–09:09:29 UT

09:08:41 UT · 30 ms 08:44:49 UT · 30 ms 08:52:32 UT · 30 ms 08:46:13 UT · 60 ms · over-exposed 09:09:29 UT · 60 ms · over-exposed 08:48:27 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.