Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 23 July 2021

‹ 22.07.2021 2021 24.07.2021 ›

Photosphere sunspot drawing and RDS evaluation

23.07.2021 photosphere drawing

High-resolution scan (3222 px)

Time
10:55 UT
Observer
Burçin TANIK
g
4
f
11
R
51
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXO – 2Group 1 · BXO – 2 Group 2 · HA_ – 6Group 2 · HA_ – 6 Group 3 · CRO – 2Group 3 · CRO – 2 Group 4 · AX_ – 1Group 4 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=23.07.2021
Saat=10:55
Gözlemci=Burçin TANIK
KontrolEden=Oğuzhan ÇAKIR
Durumaçısı=7.36
Enlemaçısı=5.1
Boylamaçısı=114.21
Boylamfark=1
GKalite=3
GDurum=G.T , B.A , K.T
Kuzeyaçısı=-0.6
Sırano=19224
AyRasatNo=22
RasatÖnceki=22.07.2021
RasatSonraki=24.07.2021

[Leke Grupları]
Grupsayısı=4:2:2
LekeSayısı=11:8:3
RölatifSayı=51:28:23
01=BXO 02 +21.623 +02.191 116.401 +0.000 0000 0 +23.180 +03.867 +20.228 +00.514 +21.623 +03.667 +21.623 +00.714
02=HA_ 06 +24.142 -27.965 086.245 +0.000 0000 0 +24.895 -26.809 +23.390 -29.121 +24.142 -27.309 +24.142 -28.621
03=CRO 02 -27.730 -41.852 072.358 +0.000 0000 0 -25.607 -38.400 -28.539 -45.305 -27.730 -38.600 -27.730 -45.105
04=AX_ 01 -16.234 -55.252 058.958 -1.000 0000 0 -16.234 -55.252 -16.234 -55.252
20210723.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 →

2021/20210723_bto · BTO · 5 frames · 107.1 MB · 10:58:48–11:07:06 UT

10:58:48 UT · 60 ms 11:03:11 UT · 60 ms 11:01:13 UT · 30 ms 11:05:38 UT · 30 ms 11:07:06 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.