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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

2 observations and 1 comments in queue.

Only observations that have a description and at least one image attached.

Sun

4.6.2021 at 13.55 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

I photographed the spectrum of the Sun on a smartphone through a spectroscope. I built the spectroscope myself and the piece of CD-R acts as a reflection grid. The spectrum is not very sharp, but many Fraunhofer lines seem to stand out from it, e.g. one Balmer line (hydrogen, ca. 486 nm), iron (ca. 527 nm) and sodium (ca. 589 nm).

Comments: 3 pcs

Several bright halo forms

3.5.2021 at 08.33 - 14.00 - Järvenpää (III)
Keijo Toikkanen, Keski-Uudenmaan Altair

In the morning I was informed that the halo phenomenon was visible. The halos were bright and visible until the afternoon, when they faded away. I took pictures with the phone’s camera, but I didn’t get all the hugs in the picture.

Sun

29.11.2020 at 14.45 - 15.45 - Järvenpää (III)
Keijo Toikkanen, Keski-Uudenmaan Altair

I went through the observations of last fall and this winter’s solar storm radio telescope and noticed that there had been an M4.4 class burst in November. It appears on the graph at about 3 p.m. The roar disrupted radio traffic in the South Atlantic. In addition, the roar sent a corona mass discharge into space.

Comments: 2 pcs

One halo form

17.5.2020 at 19.32 - Järvenpää (I)
Keijo Toikkanen, Keski-Uudenmaan Altair

Coming from the jog, I noticed a side sun in the sky to the left of the Sun, from which the red and blue colors stood out clearly.

Sun

7.2.2018 at 15.40 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

An eruption observed in the sun at about 3:40 p.m. The rating is C8.1. The source was sunspot AR2699.

Sun

7.4.2016 at 14.17 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

In the sun, a C1.9 class roar at about 2:17 p.m. Roihu from sunspot AR2529

Sun

12.2.2016 at 12.49 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

In the sun, M1.0-class roar at about 12:48 p.m. Caused by AR2497.

Images: 2 pcs

Sun

1.10.2015 at 12.30 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

Two riots observed in the Sun, at about 12:30 and 16:10. The intensities were C7.7 and M4.5. Both were from the sunspot group AR2422.

Sun

18.6.2015 at 20.30 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

At about 8:30 p.m., an M3-class rumble erupted from the sun from the sunspot AR2371. A mass corona eruption also left the area.

Sun

22.4.2015 at 11.50 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

In the sun, a C3.8-class rumble at about 11 a.m. and an M1.1-class rumble at about 11:40. Both were from the sunspot group AR2322, which is turning out of sight.

Sun

16.4.2015 at 12.00 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

The graph shows two ruts. The first took place at about 12 noon and the second at about 2:20 p.m. The intensities were C5.6 and C2.3.

Sun

16.3.2015 at 15.54 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

The graph shows three spikes caused by roaring. The first around 11:50 is C1.9, the second around 13 is M1.6. The third rumble shows up just before 4pm and was rated C2. The ruts came from the comma group AR 2297.

Sun

12.3.2015 at 16.10 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

During the day, there were many riots in the Sun, five of which are shown in the graph next to it. The first is rated C4.3, the second C8.4, the third M1.6, the fourth M1.4 and the fifth M4.2. The third and fourth riots take place very close together at about 2 p.m.

Sun

5.3.2015 at 16.10 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

Today in the Sun two rumbles, the first around 11:40 and the second around 16:10. The intensity of the first C3.5 and the second M1.2.

Sun

29.1.2015 at 13.40 - Järvenpää (IV)
Keijo Toikkanen, Keski-Uudenmaan Altair

M2.1 class roar in the Sun at about 13:40 Finnish time. Roihu from the comma group AR2268.

Comments: 1 pcs

Sun

14.1.2015 at 11.30 - Järvenpää
Keijo Toikkanen, Keski-Uudenmaan Altair

From the same comma group, AR2257, two ruts with intensities of C5.3 and M2.2. Weaker at about 11:30 a.m. and another at about 3 p.m.

Sun

15.11.2014 at 14.00 - Järvenpää (IV)
Keijo Toikkanen, Keski-Uudenmaan Altair

M3.2 class roar in the Sun at about 2 p.m. It comes from the comma group AR2209.

Sun

4.11.2014 at 10.30 - Järvenpää (IV)
Keijo Toikkanen, Keski-Uudenmaan Altair

In the sun today, the M2-class roar just before 11 p.m.

Sun

28.10.2014 at 16.00 - Järvenpää (IV)
Keijo Toikkanen, Keski-Uudenmaan Altair

Today in the Sun there is a roar of M1.6 at about 4 pm It came from a large comma group in 2192.

Sun

23.10.2014 at 12.50 - Järvenpää (III)
Keijo Toikkanen, Keski-Uudenmaan Altair

M1.1 class roar at about 12:50 p.m. from the sunspot group 2192.

Search result contains observations from time period 1.1.2000 klo 00.00 - 1.12.2021 klo 21.26.