The Minor Planets Observers Switzerland (MPOS) is a working group of the Swiss Astronomical Society. The members are engaged in the search, the recording and the determination of the position at sky at a certain time of Minor Bodies, such as Asteroids, Comets and Dwarf Planets.


Sept. 09, 2018:   Early morning of September 9, Thomas Lüthi captured the asteroid 2018 RC, which was discovered only a few days before. The pictures were taken with a refractor Borg ED 101 (f = 640mm x 0.8) and a Canon EOS20Da (exposure time 300 sec. at ISO 1600). At that time, 2018 RC (a near-Earth object of the Aten group) was crossing the constellation of Aquarius.
Jan. 01, 2018:   Just to the beginning of the new year, a near-Earth asteroid crossed the Earth's orbit: (2017 YD) with an estimated diameter of 22-50 m passed the Earth in a distance of 19 LD (lunar distances).
Coming near passages of asteroids can be found here.
Oct. 18, 2017:   The new discovered asteroid 1I/2017 U1 "Oumuamua" seems to be an interstellar visitor: Coming from direction Vega, it entered the solar system with a velocity of about 40 km/s on a hyperbolic orbit with high inclination. The asteroid passed the earth, still un-discovered, on October 14, 2017. On September 9, 2017, it passed the sun in a distance of only 37.6 million kilometers, a fourth of the distance Earth-Sun. The strange shaped, 400 m long object is ten times as long as wide and rotates quite fast. Mid of 2018, it will pass the orbit of Jupiter and beginning 2019 the one of Saturn. Further destination: Constellation Pegasus.
Orbital Elements  More 1...  2...
Oct. 14, 2017:   "3 - 2 - 1 - lift off" for the new working group! Let's watch asteroids!