Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 12 September 2021

‹ 11.09.2021 2021 13.09.2021 ›

Photosphere sunspot drawing and RDS evaluation

12.09.2021 photosphere drawing

High-resolution scan (3231 px)

Time
07:15 UT
Observer
Oğuzhan ÇAKIR
g
3
f
31
R
61
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DAI – 11Group 1 · DAI – 11 Group 2 · DAI – 17Group 2 · DAI – 17 Group 3 · AX_ – 3Group 3 · AX_ – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=12.09.2021
Saat=07:15
Gözlemci=Oğuzhan ÇAKIR
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=23.57
Enlemaçısı=7.23
Boylamaçısı=162.17
Boylamfark=3
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.5
Sırano=19273
AyRasatNo=10
RasatÖnceki=11.09.2021
RasatSonraki=13.09.2021

[Leke Grupları]
Grupsayısı=3:0:3
LekeSayısı=31:0:31
RölatifSayı=61:0:61
01=DAI 11 -20.528 +51.124 213.294 17.166 0000 0 -17.841 +54.958 -23.216 +47.290 -19.650 +53.514 -21.164 +48.607
02=DAI 17 -18.695 +34.127 196.297 15.629 0000 0 -16.819 +36.857 -20.572 +31.397 -19.408 +36.313 -18.149 +31.808
03=AX_ 03 -33.929 +30.891 193.610 +0.000 0000 0 -33.655 +31.273 -34.203 +30.509 -33.929 +30.773 -33.929 +31.900
20210912.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 →

2021/20210912_oc · OC · 16 frames · 342.8 MB · 07:47:34–08:11:24 UT

08:00:31 UT · 30 ms 07:51:52 UT · 30 ms 08:10:33 UT · 30 ms 07:47:34 UT · 40 ms 07:59:38 UT · 60 ms · over-exposed 07:50:55 UT · 60 ms · over-exposed 08:11:24 UT · 60 ms · over-exposed 08:02:29 UT · 60 ms 08:01:27 UT · 60 ms 07:58:53 UT · 60 ms 07:57:47 UT · 30 ms 07:57:05 UT · 30 ms 07:55:57 UT · 30 ms 07:54:47 UT 07:53:50 UT 07:52:52 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.