Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 25 July 2023

‹ 24.07.2023 2023 26.07.2023 ›

Photosphere sunspot drawing and RDS evaluation

25.07.2023 photosphere drawing

High-resolution scan (3227 px)

Time
09:15 UT
Observer
H.ÇAKMAK-K.Y.
g
8
f
35
R
115
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DAO – 2Group 1 · DAO – 2 Group 2 · DAI – 6Group 2 · DAI – 6 Group 3 · HA_ – 1Group 3 · HA_ – 1 Group 4 · HK_ – 10Group 4 · HK_ – 10 Group 5 · HA_ – 1Group 5 · HA_ – 1 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · DAO – 2Group 7 · DAO – 2 Group 8 · CAI – 12Group 8 · CAI – 12 Group 9Group 9
RDS data file (.gzd) 
[Gözlem]
Tarih=25.07.2023
Saat=09:15
Gözlemci=H.ÇAKMAK-K.Y.
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=7.97
Enlemaçısı=5.22
Boylamaçısı=173.58
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.3
Sırano=19773
AyRasatNo=24
RasatÖnceki=24.07.2023
RasatSonraki=26.07.2023

[Leke Grupları]
Grupsayısı=8:4:4
LekeSayısı=35:19:16
RölatifSayı=115:59:56
01=DAO 02 +09.578 +67.649 241.229 24.450 0000 0 +10.773 +69.933 +08.384 +65.366 +09.520 +68.571 +10.107 +66.206
02=DAI 06 +22.422 +54.810 228.390 31.930 0000 0 +24.407 +57.913 +20.436 +51.707 +21.133 +56.737 +23.510 +52.789
03=HA_ 01 +19.341 -03.973 169.607 -1.000 0000 0 +19.811 -03.591 +18.872 -04.355
04=HK_ 10 +14.538 -07.690 166.511 -1.000 0000 0 +17.405 +02.630 +11.672 -16.202
05=HA_ 01 -26.550 +57.980 231.560 -1.000 0000 0 -25.360 +58.669 -26.749 +57.291
06=AX_ 01 -17.667 +57.949 231.529 -1.000 0000 0 -17.667 +57.949 -17.667 +57.949
07=DAO 02 -07.841 +23.117 196.697 09.937 0000 0 -06.366 +26.163 -09.315 +20.720 -08.130 +25.134 -07.277 +20.933
08=CAI 12 -10.260 -56.184 117.396 13.827 0000 0 -07.758 -47.487 -12.763 -64.882 -08.887 -48.766 -12.343 -62.971
20230725.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 →

2023/20230725_hc · HC · 5 frames · 107.1 MB · 09:19:42–09:54:27 UT

09:54:27 UT · 30 ms 09:30:48 UT · 30 ms 09:19:42 UT · 30 ms 09:22:06 UT · 60 ms · over-exposed 09:31:40 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.