We performed astrometric and multicolor photometric observations of near-Earth asteroids at the SBG telescope of the Kourovka Astronomical Observatory of the Ural Federal University and the Zeiss-1000 telescope of the Simeiz Observatory of the Institute of Astronomy of the Russian Academy of Sciences. We improved orbital elements and estimated the A2 acceleration due to the Yarkovsky effect for asteroids (52768) 1998 OR2, (65690) 1991 DG, (159857) 2004 LJ1, (326732) 2003 HB6, (332446) 2008 AF4, (388945) 2008 TZ3, 2015 NU13 from astrometric observations with the SBG telescope. Furthermore, we estimated the axial rotation periods of the asteroids (137170) 1999 HF1, (159857) 2004 LJ1, (326732) 2003 HB6 from photometric observations with the SBG telescope. We obtained color indices for the asteroids (137170) 1999 HF1, (138127) 2000 EE14, (153591) 2001 SN263, (159857) 2004 LJ1, (326732) 2003 HB6, 2010 TV149 from multicolor photometric observations with the Zeiss-1000 telescope. Furthermore, we estimated the taxonomic classes for three asteroids, according to the color indices: the asteroid (153591) 2001 SN263 has class C, (159857) 2004 LJ1 has class S, and (326732) 2003 HB6 has class D.

In this contribution we describe the jet transport techniques that we used in Pérez-Hernández and Benet (2022) for the estimation of the Yarkovsky transversal acceleration for (99942) Apophis, which included optical and radar astrometry observations obtained during 2021 Apophis’ fly-by. Our numerical approach exploits automatic differentiation techniques which improve the orbital determination problem. We obtain a non-zero Yarkovsky parameter A2 = (−2.899±0.025) × 10−14 au d−2 which is consistent with other recent determinations of this parameter. Our results allow to constrain the collision probabilities for the close approaches in 2029, 2036 and 2068.

The problem of the origin of asteroids residing in the Jovian first-order mean motion resonances is still open. Is the observed population survivors of a much larger population formed in the resonance in primordial times? Here, we study the evolution of 182 long-lived asteroids in the 2:1 Mean Motion Resonance, identified in Brož & Vokrouhlické (2008). We numerically integrate their trajectories in two different dynamical models of the solar system: (a) accounting for the gravitational effects of the four giant planets (i.e. 4-pl) and (b) adding the terrestrial planets from Venus to Mars (i.e. 7-pl). We also include an approximate treatment of the Yarkovksy effect (as in Tsiganis et al.2003), assuming appropriate values for the asteroid diameters.