The smallest mutual distance, hitherto known to us, of any two natural celestial bodies coming at, is associated with the asteroids 215 Oenone and 1851 $\equiv$ 1950 VA. The perturbing effect of the former minor planet, as the more massive, upon the latter, smaller, at their proximity, is estimated. This is the first time ever, that the perturbing effects of measurable amount have been stated with asteroids at their close proximity, qualifying thereby such proximities as suitable for the determination of the masses of the minor planets.