Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 21 October 2021

‹ 20.10.2021 2021 22.10.2021 ›

Photosphere sunspot drawing and RDS evaluation

21.10.2021 photosphere drawing

High-resolution scan (3237 px)

Time
07:10 UT
Observer
Burçin TANIK
g
2
f
4
R
24
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 3Group 1 · AX_ – 3 Group 2 · HH_ – 1Group 2 · HH_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=21.10.2021
Saat=07:10
Gözlemci=Burçin TANIK
KontrolEden=Süleyman FİŞEK
Durumaçısı=25.8
Enlemaçısı=5.38
Boylamaçısı=7.58
Boylamfark=3
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=-0.7
Sırano=19303
AyRasatNo=14
RasatÖnceki=20.10.2021
RasatSonraki=22.10.2021

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=4:3:1
RölatifSayı=24:13:11
01=AX_ 03 +23.143 -48.658 318.922 +0.000 0000 0 +23.791 -46.606 +22.494 -50.711 +23.143 -47.105 +23.143 -50.211
02=HH_ 01 -18.408 -34.325 333.255 +0.000 0000 0 -17.336 -33.163 -19.479 -35.487 -18.408 -33.663 -18.408 -34.987
20211021.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 →

2021/20211021_bto · BTO · 6 frames · 128.6 MB · 07:16:46–07:28:12 UT

07:21:33 UT · 40 ms 07:16:46 UT · 50 ms 07:24:28 UT · 80 ms · over-exposed 07:28:12 UT · 70 ms 07:26:36 UT · 50 ms 07:19:33 UT · 70 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.