Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 23 August 2023

‹ 22.08.2023 2023 24.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

23.08.2023 photosphere drawing

High-resolution scan (3223 px)

Time
09:10 UT
Observer
Olcay PLEVNE
g
7
f
25
R
95
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HH_ – 3Group 1 · HH_ – 3 Group 2 · BXI – 3Group 2 · BXI – 3 Group 3 · HS_ – 2Group 3 · HS_ – 2 Group 4 · CAI – 7Group 4 · CAI – 7 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · HK_ – 8Group 7 · HK_ – 8
RDS data file (.gzd) 
[Gözlem]
Tarih=23.08.2023
Saat=09:10
Gözlemci=Olcay PLEVNE
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=18.56
Enlemaçısı=6.96
Boylamaçısı=150.19
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19800
AyRasatNo=21
RasatÖnceki=22.08.2023
RasatSonraki=24.08.2023

[Leke Grupları]
Grupsayısı=7:4:3
LekeSayısı=25:15:10
RölatifSayı=95:55:40
01=HH_ 03 +09.756 +37.808 187.998 -1.000 0000 0 +11.435 +39.686 +08.770 +35.930
02=BXI 03 +14.409 +18.258 168.448 +0.000 0000 0 +15.893 +20.533 +12.924 +15.984 +14.409 +20.333 +14.409 +16.184
03=HS_ 02 +31.566 -16.526 133.664 -1.000 0000 0 +32.747 -15.299 +30.385 -17.753
04=CAI 07 +13.180 -58.952 091.238 25.301 0000 0 +16.640 -52.800 +09.396 -65.895 +10.781 -54.651 +15.373 -64.433
05=AX_ 01 -18.374 +71.512 221.702 -1.000 0000 0 -18.374 +71.512 -18.374 +71.512
06=AX_ 01 -12.374 +52.176 202.366 -1.000 0000 0 -12.374 +52.176 -12.374 +52.176
07=HK_ 08 -08.574 -75.378 074.812 -1.000 0000 0 -06.264 -70.741 -10.884 -80.150
20230823.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 →

2023/20230823_op · OP · 4 frames · 85.7 MB · 09:11:23–09:16:08 UT

09:11:23 UT · 30 ms 09:12:50 UT · 30 ms 09:15:26 UT · 60 ms · over-exposed 09:16:08 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.