Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 27 August 2021

‹ 26.08.2021 2021 28.08.2021 ›

Photosphere sunspot drawing and RDS evaluation

27.08.2021 photosphere drawing

High-resolution scan (3232 px)

Time
10:45 UT
Observer
Başar COŞKUNOĞLU
g
2
f
31
R
51
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 7Group 1 · HA_ – 7 Group 2 · EAI – 24Group 2 · EAI – 24
RDS data file (.gzd) 
[Gözlem]
Tarih=27.08.2021
Saat=10:45
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Ergün EGE
Durumaçısı=19.88
Enlemaçısı=7.1
Boylamaçısı=11.57
Boylamfark=1
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.2
Sırano=19259
AyRasatNo=27
RasatÖnceki=26.08.2021
RasatSonraki=28.08.2021

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=31:7:24
RölatifSayı=51:17:34
01=HA_ 07 +19.397 -02.980 008.590 +0.000 0000 0 +20.893 -01.177 +17.900 -04.782 +19.397 -01.678 +19.397 -04.283
02=EAI 24 -27.239 -12.170 359.400 24.451 0000 0 -23.253 -06.499 -31.225 -17.840 -25.881 -07.804 -30.120 -17.185
20210827.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 →

2021/20210827_bc · BC · 6 frames · 128.6 MB · 10:45:50–10:51:52 UT

10:45:50 UT · 40 ms 10:48:16 UT · 40 ms 10:47:09 UT · 40 ms 10:51:52 UT · 60 ms · over-exposed 10:49:51 UT · 60 ms 10:51:11 UT · 60 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.