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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

1446 Sillanpaa - 7.11.2017 at 00.10 - 7.11.2017 at 00.15 Tampere Observation number 68438

Visibility II / V

Tapio Lahtinen, Tampereen Ursa

Practice with a new shooting configuration (or really just a computer turned into an Intel NUC mini machine on the balcony).
There was no pole orientation in place, and no guide was used so the shutter speeds were too short.
Well, after all, 5 different asteroids remained in the picture (and the sixth was a little too dim to stand out).

(1446) Bridge
Magnitude: 16.1
Distance: 1.5336au
Solar distance: 2.4728au
Velocity: 18.0km / s
Florian asteroid from the inner regions of the asteroid belt, approximately 8.2 kilometers in diameter.
It was discovered on January 26, 1938, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland.
It was later named after Writer Frans Eemil Sillanpää.

(4214) Veralynn
Magnitude: 15.8
Distance: 1.3196au
Solar distance: 2.2618au
Velocity: 20.4km / s
Description: Observation on a star rock.

(1960) Guisan
Magnitude: 15.6
Distance: 1.6240au
Solar distance: 2.5635au
Velocity: 18.5km / s
Carbonaceous asteroid from the middle region of the asteroid belt, approximately 25 kilometers in diameter.
It has a rotation period of 8.46 hours and a geometric albedo of 0.04–0.05.
It was discovered on October 25, 1973, by astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland, and named after Swiss General Henri Guisan.

(4631) Yabu
Magnitude: 15.6
Distance: 1.0721au
Solar distance: 2.0205au
Velocity: 21.9km / s
It was discovered on November 22, 1987, by Seiji Ueda and Hiroshi Kaneda.
Hiroshi Kaneda (born 1953) is a Japanese astronomer. He is the eighth most prolific individual Discoverer of Asteroids.
Between 1987 and 2000, Kaneda (in Collaboration with Seiji Ueda) discovered 705 Asteroids.

(4097) Tsurugisan
Magnitude: 15.9
Distance: 1.0605au
Solar distance: 2.0115au
Velocity: 22.0km / s
(4097) Tsurugisan is a major belt asteroid discovered on November 18, 1987 by Tsutomu Seki at the Geisei Observatory.
The asteroid was named after the Japanese mountain Tsurugi-san.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 1446 Sillanpaa
    • Heikosti näkyvä
Technical information

TS80 Triplet, 0.8X Reducer, SXV-694, 10x30s, bin2, L

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