Manx objects approach the inner solar system on long-period comet (LPC) orbits with the consequent high inbound velocities, but unlike comets, Manxes display very little to no activity even near perihelion. This suggests that they may have formed in circumstances different from typical LPCs; moreover, this lack of significant activity also renders them difficult to detect at large distances. Thus, analyzing their physical properties can help constrain models of solar system formation as well as sharpen detection methods for those classified as NEOs. Here, we focus on the Manx candidate A/2018 V3 as part of a larger effort to characterize Manxes as a whole. This particular object was observed to be inactive even at its perihelion at q = 1.34 au in 2019 September. Its spectral reflectivity is consistent with typical organic-rich comet surfaces with colors of , , and , corresponding to a spectral reflectivity slope of 10.6 0.9%/100 nm. A least-squares fit of our constructed light curve to the observational data yields an average nucleus radius of ≈2 km assuming an albedo of 0.04. This is consistent with the value measured from NEOWISE. A surface brightness analysis for data taken 2020 July 13 indicated possible low activity (≲0.68 g s⁻¹), but not enough to lift optically significant amounts of dust. Finally, we discuss Manxes as a constraint on solar system dynamical models as well as their implications for planetary defense.

Manx物体以很高的入站速度接近长周期彗星（LPC）轨道上的内部太阳系，但是与彗星不同，Manxes即使在近日点附近也几乎没有活动。这表明它们可能是在不同于典型LPC的情况下形成的；此外，这种缺乏重要活动的现象也使它们很难在远距离被发现。因此，分析它们的物理性质可以帮助约束太阳系形成模型，并为分类为NEO的方法提高检测方法。在这里，我们将重点放在Manx候选A / 2018 V3上，这是对整个Manxes进行特征化的更大努力的一部分。观察到该特定物体即使在q的近日点也处于非活动状态= 1.34 au在2019年9月 其光谱反射率是用颜色的典型富含有机物彗星表面一致，和，对应于10.6 0.9％/ 100nm的分光反射率斜率。假设反照率为0.04，我们构建的光曲线与观测数据的最小二乘拟合产生的平均核半径为≈2km。这与NEOWISE测得的值一致。对2020年7月13日获得的数据进行的表面亮度分析表明，可能存在较低的活度（≲0.68gs ^-1），但不足以举起光学上大量的灰尘。最后，我们讨论了Manxes作为对太阳系动力学模型的约束及其对行星防御的影响。