Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 24 April 2023

‹ 22.04.2023 2023 25.04.2023 ›

Photosphere sunspot drawing and RDS evaluation

24.04.2023 photosphere drawing

High-resolution scan (3229 px)

Time
07:35 UT
Observer
Ergün EGE
g
6
f
10
R
70
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 2Group 1 · HA_ – 2 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · AX_ – 1Group 3 · AX_ – 1 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · ESO – 4Group 5 · ESO – 4 Group 6 · AX_ – 1Group 6 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=24.04.2023
Saat=07:35
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-25.18
Enlemaçısı=-4.86
Boylamaçısı=311.67
Boylamfark=2
GKalite=3
GDurum=
Kuzeyaçısı=-0.4
Sırano=19697
AyRasatNo=15
RasatÖnceki=22.04.2023
RasatSonraki=25.04.2023

[Leke Grupları]
Grupsayısı=6:2:4
LekeSayısı=10:3:7
RölatifSayı=70:23:47
01=HA_ 02 +12.471 +81.396 033.660 +0.000 0000 0 +13.335 +84.633 +11.607 +78.158 +12.471 +84.134 +12.471 +78.659
02=HS_ 01 +09.478 +67.371 019.410 +0.000 0000 0 +10.467 +68.151 +08.488 +66.591 +09.478 +67.651 +09.478 +67.910
03=AX_ 01 -22.720 +47.197 358.867 +0.000 0000 0 -21.835 +47.553 -22.308 +46.841 -22.720 +47.530 -22.720 +47.341
04=AX_ 01 -08.428 +15.958 327.628 +0.000 0000 0 -08.620 +16.168 -08.794 +15.748 -08.428 +15.668 -08.428 +16.248
05=ESO 04 -17.671 -40.867 270.803 +0.000 0000 0 -16.103 -35.369 -19.239 -46.365 -17.671 -35.569 -17.671 -46.165
06=AX_ 01 -11.182 -50.117 261.553 +0.000 0000 0 -10.785 -49.433 -11.578 -50.802 -11.182 -49.932 -11.182 -50.302
20230424.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 →

2023/20230424_ee · EE · 8 frames · 171.4 MB · 07:37:29–07:55:43 UT

07:55:07 UT · 40 ms 07:39:06 UT · 40 ms 07:37:29 UT · 30 ms 07:55:43 UT · 30 ms 07:40:19 UT · 50 ms · over-exposed 07:54:32 UT · 50 ms · over-exposed 07:41:29 UT · 60 ms · over-exposed 07:53:57 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.