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Nordic-Baltic Astronomy Days 2026

26–29 May 2026
Radisson Blu Marina Palace Hotel
Europe/Helsinki timezone

Session

26-B2: Planets

Tu-08B
26 May 2026, 14:45
Room B

Room B

Description

Chair: Dainis Dravins

Presentation materials

There are no materials yet.

  1. 241. Constraining the interior characteristics of near-Earth asteroids with telescopic surveys, population models, space missions, and laboratory experiments
    Mikael Granvik (University of Helsinki, Finland / Luleå University of Technology, Sweden)
    26/05/2026, 14:45
    Oral

    The interiors of asteroids, that is, their bulk composition and structure, are largely unknown today except for a few special cases. Apart from drilling and radar sounding, both of which are techniques yet to be applied to asteroids, let alone applied to a large number of asteroids, our knowledge of asteroid interiors is based on indirect observations such as rotation rates as well as the...

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  2. 242. Observing the building blocks of the Solar System with the Nordic Optical Telescope
    Grigori Fedorets (FINCA)
    26/05/2026, 15:00
    Oral

    Asteroids comprise of material left over from the early days of the formation of the Solar System. Studying their physical composition and dynamical evolution are among the best evidence for the initial conditions and dynamical evolution of the Solar System. Asteroids come in sizes from metres up to hundreds of kilometres. Currently, essentially no data exist on the very small asteroids...

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  3. 243. Compositional properties of near-Earth binary asteroid (163693) Atira from Nordic observatories
    Eric MacLennan (Instituto de Astrofísica de Canarias)
    26/05/2026, 15:15
    Oral

    The near-Earth asteroids having orbits completely interior to Earth's are referred to as Atira class, named after the first discovered member (163693) Atira. This asteroid is the only confirmed binary asteroid in the Atira class with a primary component size of nearly 5 km orbited by a smaller $\sim$1 km secondary. Radar imaging (Deleon et al. 2024) used to detect the secondary has been used...

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  4. 244. Predictions for the Apophis 2029 Earth Close Approach from DEM Simulations
    Joseph DeMartini (University of Helsinki)
    26/05/2026, 15:30
    Oral

    The upcoming close encounter of asteroid 99942 Apophis with Earth in 2029 presents a once-in-7000-years opportunity to study the dynamics, bulk properties, and interior structure of a potential rubble-pile asteroid as it passes deeply through Earth’s gravitational field. Numerical modeling—including via Discrete Element Methods (DEMs)—has helped to develop our understanding of the dynamics and...

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