Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 30 August 2023

‹ 29.08.2023 2023 31.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

30.08.2023 photosphere drawing

High-resolution scan (3224 px)

Time
09:35 UT
Observer
Olcay PLEVNE
g
6
f
20
R
80
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · HK_ – 5Group 2 · HK_ – 5 Group 3 · AX_ – 1Group 3 · AX_ – 1 Group 4 · CAI – 6Group 4 · CAI – 6 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · ESI – 6Group 6 · ESI – 6
RDS data file (.gzd) 
[Gözlem]
Tarih=30.08.2023
Saat=09:35
Gözlemci=Olcay PLEVNE
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=20.54
Enlemaçısı=7.15
Boylamaçısı=57.47
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19807
AyRasatNo=28
RasatÖnceki=29.08.2023
RasatSonraki=31.08.2023

[Leke Grupları]
Grupsayısı=6:3:3
LekeSayısı=20:7:13
RölatifSayı=80:37:43
01=AX_ 01 +30.718 +70.235 127.705 -1.000 0000 0 +30.718 +70.235 +30.718 +70.235
02=HK_ 05 +10.730 +40.801 098.271 +0.000 0000 0 +12.531 +43.474 +07.614 +38.127 +10.730 +42.974 +10.730 +38.627
03=AX_ 01 +21.262 -74.712 342.758 -1.000 0000 0 +21.262 -74.712 +21.262 -74.712
04=CAI 06 -09.249 +21.937 079.407 +0.000 0000 0 -07.375 +25.440 -11.122 +18.435 -09.249 +25.240 -09.249 +18.635
05=AX_ 01 -18.188 -11.690 045.780 +0.000 0000 0 -17.545 -10.807 -18.831 -12.573 -18.188 -11.307 -18.188 -12.730
06=ESI 06 -07.148 -61.575 355.895 +0.000 0000 0 -04.620 -53.873 -09.677 -69.277 -07.148 -54.730 -07.148 -69.770
20230830.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 →

2023/20230830_op · OP · 4 frames · 85.7 MB · 09:33:08–09:35:52 UT

09:34:25 UT · 30 ms 09:33:08 UT · 30 ms 09:35:07 UT · 60 ms · over-exposed 09:35:52 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.