  Vatira-class near-Earth objects (NEOs) have orbits entirely interior to the
orbit of Venus with aphelia $0.307<Q<0.718$ AU. Recently discovered asteroid
2020 AV$_2$ by the Zwicky Transient Facility on 4 January 2020 is the first
known object on a Vatira orbit. Numerical integrations of 2020 AV$_2$'s nominal
orbit show it remaining in the Vatira region for the next few hundred kyr
before coupling to Venus and evolving onto an Atira orbit (NEOs entirely
interior to Earth's orbit with $0.718<Q<0.983$ AU) and eventually scattering
out to Earth-crossing. The numerical integrations of 9900 clones within 2020
AV$_2$'s orbital uncertainty region show examples of Vatira orbits trapped in
the 3:2 mean-motion resonance with Venus at semimajor axis $a\approx0.552$ AU
that can survive on the order of a few Myr. Possible 2020 AV$_2$ orbits also
include those on Vatira orbits between Mercury and Venus that only rarely cross
that of a planet. Together the 3:2 resonance and these rarely-planet-crossing
orbits provide a meta-stable region of phase space that are stable on
timescales of several Myr. If 2020 AV$_2$ is currently in this meta-stable
region (or was in the past), that may explain its discovery as the first Vatira
and may be where more are discovered.
