Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 17 April 2024

‹ 16.04.2024 2024 18.04.2024 ›

Photosphere sunspot drawing and RDS evaluation

17.04.2024 photosphere drawing

High-resolution scan (3227 px)

Time
07:10 UT
Observer
Burçin TANIK
g
15
f
111
R
261
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · EKO – 13Group 1 · EKO – 13 Group 2 · HS_ – 3Group 2 · HS_ – 3 Group 3 · AX_ – 2Group 3 · AX_ – 2 Group 4 · EKC – 25Group 4 · EKC – 25 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · AX_ – 2Group 6 · AX_ – 2 Group 7 · HS_ – 1Group 7 · HS_ – 1 Group 8 · AX_ – 2Group 8 · AX_ – 2 Group 9 · HS_ – 1Group 9 · HS_ – 1 Group 10 · CSI – 6Group 10 · CSI – 6 Group 11 · ?__ – 6Group 11 · ?__ – 6 Group 12 · CAI – 10Group 12 · CAI – 10 Group 13 · DAI – 11Group 13 · DAI – 11 Group 14 · CSI – 9Group 14 · CSI – 9 Group 15 · DKI – 19Group 15 · DKI – 19
RDS data file (.gzd) 
[Gözlem]
Tarih=17.04.2024
Saat=07:10
Gözlemci=Burçin TANIK
KontrolEden=Korhan YELKENCİ
Durumaçısı=-25.82
Enlemaçısı=-5.41
Boylamaçısı=253.59
Boylamfark=3
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-1.0
Sırano=19963
AyRasatNo=16
RasatÖnceki=16.04.2024
RasatSonraki=18.04.2024

[Leke Grupları]
Grupsayısı=15:7:8
LekeSayısı=111:47:64
RölatifSayı=261:117:144
01=EKO 13 +27.408 +57.460 311.500 16.640 0000 0 +29.454 +62.996 +25.361 +51.924 +26.676 +60.238 +28.562 +53.912
02=HS_ 03 +09.802 +20.201 273.791 +0.000 0000 0 +10.655 +21.530 +08.950 +19.350 +09.802 +20.791 +09.802 +19.611
03=AX_ 02 +13.746 +12.605 266.195 +0.000 0000 0 +14.128 +13.220 +13.364 +12.188 +13.746 +12.621 +13.746 +12.589
04=EKC 25 +27.889 -33.721 219.869 25.613 0000 0 +31.820 -28.216 +24.697 -39.227 +25.912 -28.986 +30.590 -37.685
05=HS_ 01 +10.186 -69.125 184.465 +0.000 0000 0 +11.890 -68.155 +09.283 -70.960 +10.186 -68.223 +10.186 -70.270
06=AX_ 02 +20.109 -69.370 184.220 +0.000 0000 0 +20.370 -68.175 +19.848 -70.565 +20.109 -68.675 +20.109 -70.650
07=HS_ 01 +13.440 -72.884 180.706 +0.000 0000 0 +14.700 -71.585 +12.810 -74.183 +13.440 -72.850 +13.440 -73.683
08=AX_ 02 -04.335 +68.486 322.760 +0.000 0000 0 -04.700 +69.521 -04.663 +67.450 -04.335 +69.210 -04.335 +67.951
09=HS_ 01 -07.902 +66.928 320.518 +0.000 0000 0 -07.800 +68.135 -08.796 +65.722 -07.902 +67.634 -07.902 +66.222
10=CSI 06 -21.479 -07.696 245.894 42.130 0000 0 -19.372 -05.563 -23.586 -09.829 -20.658 -06.189 -22.969 -08.757
11=?__ 06 -13.851 -24.820 229.508 +0.000 0000 0 -12.425 -20.719 -15.277 -27.444 -13.851 -21.958 -13.851 -27.682
12=CAI 10 -18.340 -26.965 226.625 +0.000 0000 0 -16.959 -22.557 -19.108 -31.373 -18.340 -22.757 -18.340 -31.173
13=DAI 11 -09.441 -31.598 221.992 01.873 0000 0 -08.382 -28.757 -10.501 -34.439 -09.441 -28.957 -09.607 -34.170
14=CSI 09 -13.535 -37.150 216.440 29.652 0000 0 -11.388 -34.243 -15.681 -40.570 -14.845 -34.831 -12.318 -39.277
15=DKI 19 -13.271 -46.381 207.209 17.930 0000 0 -11.000 -41.668 -15.542 -51.940 -12.441 -42.177 -14.498 -48.885
20240417.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 →

2024/20240417_bto · BTO · 6 frames · 128.6 MB · 07:14:54–07:21:07 UT

07:19:21 UT · 30 ms 07:14:54 UT · 70 ms 07:17:28 UT · 30 ms 07:16:35 UT · 80 ms · over-exposed 07:20:17 UT · 80 ms 07:21:07 UT · 30 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.