Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 27 July 2021

‹ 26.07.2021 2021 28.07.2021 ›

Photosphere sunspot drawing and RDS evaluation

27.07.2021 photosphere drawing

High-resolution scan (3230 px)

Time
07:35 UT
Observer
Oğuzhan ÇAKIR
g
2
f
7
R
27
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXO – 5Group 1 · BXO – 5 Group 2 · AX_ – 2Group 2 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=27.07.2021
Saat=07:35
Gözlemci=Oğuzhan ÇAKIR
KontrolEden=Burçin TANIK
Durumaçısı=8.97
Enlemaçısı=5.42
Boylamaçısı=63.13
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.5
Sırano=19228
AyRasatNo=26
RasatÖnceki=26.07.2021
RasatSonraki=28.07.2021

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=7:5:2
RölatifSayı=27:15:12
01=BXO 05 +26.790 +16.432 079.562 16.494 0000 0 +28.251 +21.524 +23.908 +11.339 +24.751 +20.757 +27.252 +12.272
02=AX_ 02 -26.848 +02.467 065.597 +0.000 0000 0 -26.623 +03.220 -27.740 +01.715 -26.848 +02.720 -26.848 +02.214
20210727.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 →

2021/20210727_oc · OC · 15 frames · 321.4 MB · 08:11:15–08:32:06 UT

08:11:15 UT · 30 ms 08:22:44 UT · 30 ms 08:12:28 UT · 60 ms · over-exposed 08:31:09 UT · 30 ms 08:32:06 UT · 60 ms · over-exposed 08:23:35 UT · 60 ms · over-exposed 08:26:08 UT · 60 ms 08:25:25 UT · 60 ms 08:24:40 UT · 60 ms 08:21:49 UT · 30 ms 08:21:07 UT · 30 ms 08:20:11 UT · 30 ms 08:19:21 UT 08:18:12 UT 08:13:39 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.