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

Ursa Astronomical Association

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

Ptolemaeus, Alphonsus, Arzachel

9.5.2022 at 23.43 - 23.45 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

Ptolemaeus photographed just over a day after my previous attempt. Visually, looking at the Moon at Merz, the weather seemed so more worthy that I got excited to bite the tower with a more powerful but whimsical C11 tube. The craters that remained under the floor of Ptolemaeus were no longer distinguished, except for Ptolemaeus B, which is to the north of the younger crater of Ammonius. The smaller, fresher craters at the base of Ptolemaicus stood out well in this illumination. At the bottom of the Alphonsus are a series of slats and apparently volcanic tiny craters along them that have scatte...

Comments: 3 pcs

Moretus, Curtius, Schomberger

9.5.2022 at 23.32 - 23.35 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

I photographed the southern parts of the Crescent. The ruler of the lunar Antarctic, Moretus, was near the terminator, the bottom still in the shade for the most part. The edge of Moretus has collapsed into terraces as the crater has formed, as is the case with craters of this size. Moretus' northeastern neighbor, Curtius, also looks quite interesting. There are apparently crater chains at the bottom and edge of it, would there be secondary craters in Moretus? Schomberger is very similar to Moretus, but is smaller and has a low central peak. I am always a little lost in these polar regions...

Images: 2 pcs

Hipparchus, Ptolemaeus, Albategnius

8.5.2022 at 22.58 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

The steep light of the sunrise brought out ghost craters from the flat bottom of the Ptolemaeus crater, buried beneath the later strata (perhaps the finer flies that flew in the formation of the Imbrium basin). Traces of the Imbrium collision are also visible in the area as valleys pointing to the Imbrium, which is the making of larger bodies flying from the collision. One of them bevels a ruined crater north of Ptolemaeus, named after the Finnish Hugo Gyldén. Near the Réaumur crater, north of Gyldén, there are two slopes, the Rima Oppolzer and the Rima Réaumur. The latter runs from Réaumur to...

Gassendi & Mersenius

14.3.2022 at 22.56 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

To the west of Mare Humorum is the convex-based crater Mersenius. There are many ridges, narrow gorges in the area, including Rimae Mersenius to the east of Mersenius, Rimae De Gasparis around the De Gasparis crater to the south of Mersenius, and cracks at the bottom of the Gassendi crater. #Lunar100: 013 #Lunar100: 044 #Lunar100: 091

Sinus Iridum, Mons Gruithuisen Gamma Delta

14.3.2022 at 22.50 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

Sinus Iridum shone in the morning light. On the southwest side of the edge of Mare Imbrium are two bumps side by side, the Mons Gruithuisen Gamma and the Mons Gruithuisen Delta, which are ancient volcanoes 1.5 and 1.8 kilometers high. The names of the mountains refer to the Gruithuisen crater south of them, which in turn is named after the German Franz von Paula Gruithuisen. Gruithuisen was one of the foremost lunar invaders of the early 19th century, however, he is best remembered for imagining seeing the city on the Moon. The city of Gruithuisen (Wallwerk) is not in this picture, but it is n...

Prinz

14.3.2022 at 22.47 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

The plateau of Aristarchus was adjacent to the terminator and to its east by the crater Prinz, the edge of which is partly covered by the lava of the Oceanus Procellarum. There are a number of narrow slats (Rimae Prinz) around Prinz, which can be found in the picture if you look closely enough. #Lunar100: 022 #Lunar100: 086

Tycho

12.3.2022 at 22.52 - Lappeenranta (III)
Jerry Jantunen, Ursa (Helsinki)

Tycho, the youngest large crater on the moon, stands out from its old neighbors with its sharpness.

Copernicus

12.3.2022 at 22.38 - Lappeenranta (III)
Jerry Jantunen, Ursa (Helsinki)

I erected the tube quite shakily on a thick spring hang. It was not possible to do the polar orientation either, so tracking was what happened. Even the combination of a red filter and a color camera did not facilitate image processing. However, Copernicus with its secondary craters came into the picture. Copernicus is a young crater, apparently about 800 million years old. Even younger is the small Copernicus H to its southeast, which has dug into its surroundings a darker substance that was under Copernicus' light sheds. #Lunar100: 005 #Lunar100: 074

Vallis Inghirami

16.1.2022 at 22.59 - 23.02 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

The youngest of the Moon's largest collision basins, the Orientale Basin, was formed about 3.8 billion years ago when several tens of kilometers of asteroids splashed on the side of the Moon. Many tracks also flew into the environment from the collision, the traces of which are visible as direct grooves to the southeast of the Orientale Basin. At a more precise resolution, the grooves could be seen as chains of overlapping craters. Mare Orientale, in the middle of the Orientale Basin, was still in the shadow of the Moon at the time of this image. A small section of the Cordillera Mountains...

Rimae Sirsalis & Crüger

16.1.2022 at 22.56 - 22.58 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

There is a long, narrow gorge on the side of Sirsalis that runs from the east side of Darwin Crater to Oceanus Procellarum. It takes its name from the Sirsalis crater, which is close to the Procellarum, partly on top of an older crater of the same size (Sirsalis A). At the edges of the De Vico A crater, the rille descends and rises quite sharply. On the east side of Crüger, the rille makes a bend. The Crüger crater has a flat dark lava base. Crüger is quite reminiscent of the Billy Crater on the right bank of the Procellarum, but stands out more clearly from its pale surroundings. The Darwin C...

Comments: 1 pcs

Jupiter

14.9.2021 at 23.06 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

The pale ovals spotted the southern hemisphere. Io had just come out of the shadow of Jupiter.

Jupiter

30.8.2021 at 23.59 - Lappeenranta (III)
Jerry Jantunen, Ursa (Helsinki)

The big red dot didn't have time to hide. Large dark spots appeared on the north side of the NEB. Io also hit the picture.

Saturn

30.8.2021 at 23.42 - 23.45 - Lappeenranta (III)
Jerry Jantunen, Ursa (Helsinki)

Saturn photographed from a height of less than 10 degrees.

Jupiter

30.8.2021 at 00.41 - 00.43 - Lappeenranta (III)
Jerry Jantunen, Ursa (Helsinki)

The shadow of Europe was visible on the surface of Jupiter. Europa himself was in front of Jupiter, but did not stand out very well. Ganymedes was about to begin the crossing.

Jupiter

29.8.2021 at 01.18 - 01.20 - Lappeenranta (III)
Jerry Jantunen, Ursa (Helsinki)

Io appeared in front of Jupiter, its shadow followed.

Venus

6.8.2021 at 14.46 - 14.52 - Helsinki (II)
Jerry Jantunen, Ursa (Helsinki)

80.7% illuminated from Venus. I was struggling to take a picture before the planes came to spin.

Venus

5.8.2021 at 16.16 - 16.22 - Helsinki (II)
Jerry Jantunen, Ursa (Helsinki)

80.9% illuminated from Venus. The flight demonstration drills were underway around Kaivopuisto. The sound of the helicopter made the pedestal resonate so that Venus occasionally bounced pretty wildly in the field of view.

Venus

25.7.2021 at 16.52 - 16.58 - Helsinki (II)
Jerry Jantunen, Ursa (Helsinki)

83.9% illuminated from Venus.

Venus

17.7.2021 at 17.54 - 18.00 - Helsinki (II)
Jerry Jantunen, Ursa (Helsinki)

86% illuminated by Venus. Seeing was normal. However, the sky was clear, which is the main thing in the purple description of Venus. Even the harmless-looking gauze cloud frills have often made filming impossible.

Venus

11.7.2021 at 17.58 - 18.04 - Helsinki (III)
Jerry Jantunen, Ursa (Helsinki)

So far in July, the best seeing hit a windy day when the temperature was a little below the heat limit. 87.4% illuminated from Venus.

Search result contains observations from time period 1.1.2000 klo 00.00 - 26.5.2022 klo 19.52.