Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 31 August 2023

‹ 30.08.2023 2023 01.09.2023 ›

Photosphere sunspot drawing and RDS evaluation

31.08.2023 photosphere drawing

High-resolution scan (3229 px)

Time
08:55 UT
Observer
Hikmet ÇAKMAK
g
6
f
28
R
88
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 13Group 1 · HA_ – 13 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · DAI – 6Group 3 · DAI – 6 Group 4 · HR_ – 1Group 4 · HR_ – 1 Group 5 · HR_ – 3Group 5 · HR_ – 3 Group 6 · CAO – 4Group 6 · CAO – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=31.08.2023
Saat=08:55
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=20.8
Enlemaçısı=7.17
Boylamaçısı=44.63
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.5
Sırano=19808
AyRasatNo=29
RasatÖnceki=30.08.2023
RasatSonraki=01.09.2023

[Leke Grupları]
Grupsayısı=6:2:4
LekeSayısı=28:14:14
RölatifSayı=88:34:54
01=HA_ 13 +10.257 +53.774 098.404 +0.000 0000 0 +13.600 +56.632 +07.508 +50.916 +10.257 +56.132 +10.257 +51.416
02=AX_ 01 +21.125 -59.578 345.520 -1.000 0000 0 +21.125 -59.578 +21.125 -59.578
03=DAI 06 -08.316 +33.761 078.391 14.670 0000 0 -05.894 +35.849 -10.738 +31.673 -08.186 +35.300 -08.909 +32.117
04=HR_ 01 -18.253 +01.576 046.206 +0.000 0000 0 -17.823 +02.500 -18.683 +01.102 -18.253 +01.775 -18.253 +01.377
05=HR_ 03 -05.709 -41.100 003.530 +0.000 0000 0 -05.800 -40.239 -06.409 -41.960 -05.709 -40.739 -05.709 -41.460
06=CAO 04 -08.444 -47.897 356.733 27.771 0000 0 -07.330 -45.820 -09.855 -49.974 -09.208 -46.428 -07.652 -49.385
20230831.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 →

2023/20230831_hc · HC · 6 frames · 128.6 MB · 08:48:29–09:24:20 UT

08:48:29 UT · 30 ms 09:08:29 UT · 30 ms 09:24:20 UT · 30 ms 08:58:43 UT · 30 ms 09:09:23 UT · 60 ms · over-exposed 08:52:42 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.