Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 24 February 2024

‹ 23.02.2024 2024 27.02.2024 ›

Photosphere sunspot drawing and RDS evaluation

24.02.2024 photosphere drawing

High-resolution scan (3230 px)

Time
11:15 UT
Observer
Başar COŞKUNOĞLU
g
5
f
45
R
95
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · FHC – 40Group 2 · FHC – 40 Group 3 · HS_ – 1Group 3 · HS_ – 1 Group 4 · DSO – 2Group 4 · DSO – 2 Group 5 · HS_ – 1Group 5 · HS_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=24.02.2024
Saat=11:15
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Korhan YELKENCİ
Durumaçısı=-20.14
Enlemaçısı=-7.12
Boylamaçısı=230.2
Boylamfark=0
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.9
Sırano=19923
AyRasatNo=15
RasatÖnceki=23.02.2024
RasatSonraki=27.02.2024

[Leke Grupları]
Grupsayısı=5:3:2
LekeSayısı=45:42:3
RölatifSayı=95:72:23
01=HS_ 01 +28.430 +48.918 279.118 +0.000 0000 0 +29.680 +49.944 +27.180 +47.893 +28.430 +49.444 +28.430 +48.392
02=FHC 40 +18.109 -11.411 218.789 +0.000 0000 0 +21.755 -02.210 +14.463 -20.800 +18.109 -02.221 +18.109 -20.600
03=HS_ 01 +05.368 -65.631 164.569 +0.000 0000 0 +06.380 -63.501 +04.356 -67.761 +05.368 -64.100 +05.368 -67.261
04=DSO 02 -12.186 -67.228 162.972 +0.000 0000 0 -10.554 -63.276 -13.818 -71.179 -12.186 -63.476 -12.186 -70.979
05=HS_ 01 -34.752 -68.826 161.374 +0.000 0000 0 -33.928 -67.751 -35.576 -69.900 -34.752 -68.251 -34.752 -69.400
20240224.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 →

2024/20240224_bc · BC · 6 frames · 128.6 MB · 11:33:08–11:37:17 UT

11:33:08 UT · 40 ms 11:34:43 UT · 40 ms 11:35:21 UT · 40 ms 11:36:00 UT · 70 ms · over-exposed 11:37:17 UT · 70 ms · over-exposed 11:36:40 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.