Kuiper Kerman's belt has many notches and a very wide buckle. Little things like Tam appear through these notches, and kerbals who don't criticize him for wearing such a large belt do praise his eccentric fashion sense on the whole just as they praise his devotion to finding and naming the little things out there. Tam is far from the only one of its kind but it's the only one found captured by a larger body to date. Before Tam got its personal name, it carried a designation often given to the more interesting of its kind. For Tam it was KB 4089848.

Tam holds JNSQ records for being both the smallest and most oblate celestial body. It is even smaller than stock Gilly.

Rational Resources Classification:

Ocean	Surface	Atmosphere	Exosphere
None	Ice-Methane	None	None

From the PDF included in the download:

Bulk Params		Orbital and Rotational Params
Classification	Moon (Eeloo)	Semi-major Axis	64,670 km
Radius	10 km sea level, 13.6 km mean	Periapsis	63,053 km
Mass	5.14227×1016 kg	Apoapsis	66,287 km
Gravitational Parameter	3.43233×106 m3/s2	Orbit eccentricity	0.025
Mean density	4,900 kg/m3	Orbit inclination	9.5°
Surface gravity	0.0035 g ASL	Longitude of ascending node	105°
Escape velocity	26 m/s	Argument of periapsis	210°
Bond Albedo	0.2	Sidereal orbit period	103.94 days
Solar irradiance	8.6 W/m2	Synodic period	104.61 days
Black-body temperature	74 K	Mean orbital velocity	90 m/s
		Sidereal rotation period	103.94 days
		Solar day	104.61 days
		Synchronous orbit altitude	N/A
		Sphere of influence	544 km