Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 16 July 2021

‹ 15.07.2021 2021 17.07.2021 ›

Photosphere sunspot drawing and RDS evaluation

16.07.2021 photosphere drawing

High-resolution scan (3231 px)

Time
07:10 UT
Observer
Burçin TANIK
g
3
f
8
R
38
Seeing
4 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 3Group 1 · HS_ – 3 Group 2 · AX_ – 4Group 2 · AX_ – 4 Group 3 · ?__ – 1Group 3 · ?__ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=16.07.2021
Saat=07:10
Gözlemci=Burçin TANIK
KontrolEden=Başar COŞKUNOĞLU
Durumaçısı=4.26
Enlemaçısı=4.45
Boylamaçısı=208.9
Boylamfark=3
GKalite=4
GDurum=G.T
Kuzeyaçısı=-0.2
Sırano=19217
AyRasatNo=15
RasatÖnceki=15.07.2021
RasatSonraki=17.07.2021

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=8:3:5
RölatifSayı=38:13:25
01=HS_ 03 +24.433 -10.685 198.215 +0.000 0000 0 +25.228 -09.978 +23.638 -11.391 +24.433 -10.479 +24.433 -10.892
02=AX_ 04 -17.890 +61.990 270.890 +0.000 0000 0 -16.425 +65.311 -17.754 +58.669 -17.890 +64.811 -17.890 +59.169
03=?__ 01 -42.480 -74.209 134.691 +0.000 0000 0 -41.859 -72.511 -43.100 -75.908 -42.480 -73.100 -42.480 -75.408
20210716.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 →

2021/20210716_bto · BTO · 7 frames · 150.0 MB · 07:14:49–07:33:13 UT

07:30:12 UT · 30 ms 07:14:49 UT · 30 ms 07:20:42 UT · 40 ms 07:23:03 UT · 60 ms 07:25:39 UT · 70 ms · over-exposed 07:33:13 UT · 60 ms 07:17:42 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.