Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 25 June 2021

‹ 24.06.2021 2021 26.06.2021 ›

Photosphere sunspot drawing and RDS evaluation

25.06.2021 photosphere drawing

High-resolution scan (3230 px)

Time
07:00 UT
Observer
Ergün EGE
g
2
f
3
R
23
Seeing
4 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HR_ – 1Group 1 · HR_ – 1 Group 2 · BXO – 2Group 2 · BXO – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=25.06.2021
Saat=07:00
Gözlemci=Ergün EGE
KontrolEden=Burçin TANIK
Durumaçısı=-5.19
Enlemaçısı=2.22
Boylamaçısı=126.92
Boylamfark=3
GKalite=4
GDurum=
Kuzeyaçısı=-0.3
Sırano=19198
AyRasatNo=18
RasatÖnceki=24.06.2021
RasatSonraki=26.06.2021

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=3:1:2
RölatifSayı=23:11:12
01=HR_ 01 +23.769 +79.177 206.970 +0.000 0000 0 +24.342 +81.182 +23.197 +77.172 +23.769 +80.682 +23.769 +77.672
02=BXO 02 -18.605 -74.973 051.947 +0.000 0000 0 -17.943 -71.969 -19.267 -77.976 -18.605 -72.469 -18.605 -77.477
20210625.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 →

2021/20210625_ee · EE · 6 frames · 128.6 MB · 08:31:11–08:45:04 UT

08:36:05 UT · 40 ms 08:40:13 UT · 30 ms 08:42:01 UT · 70 ms 08:31:11 UT · 40 ms 08:43:31 UT · 90 ms · over-exposed 08:45:04 UT · 110 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.