Summary for : 19P/Borrely
Dyn  T.T  T.B  T T.L B  T.D  Density (g/cm^3)  Δρ/ρ  Diameter (km)  ΔD/D  Mass (kg)  ΔM/M  Ref  Avg.M 
COM            0.05 ± 0.04 (X)  82 %  4.8 ± 0.4  8.3 %  2.70e+12 ± 2.10e+12  78 %  S  EVM 
COM            0.05 ± 0.04 (X)  82 %  4.8 ± 0.4  8.3 %  2.70e+12 ± 2.10e+12  78 %  S  w.avg 
COM    0.12 ± 0.09 (X)  75 %  4.8 ± 0.4  8.3 %  2.70e+12 ± 2.10e+12  78 %  C  ? 
Average asteroid densities (g/cm^3): C = 1.3 ± 0.6, B = 2.4 ± 0.5, S = 2.7 ± 0.5, M = 3.5 ± 1.0, P = 2.8 ± 1.6,
X = 1.9 ± 0.8, Xc = 4.9 ± 0.9, Xk = 4.2 ± 0.7 (Ref)

Additional resources:
Note:
The density estimates have been ranked from (A) to (E), corresponding to the relative error: (B) less than 20%,
(C) between 20 and 50%, (D) between 50 and 100%, and (E) more than 100%. (A) stands for (presumably) reliable estimates (accuracy better than 20%), based on more than 5 mass estimates and 5 diameter
estimates, or a spacecraft encounter. Apparently unrealistic densities (ρ > 8) are tagged with (X).
EVM: average by using the Expected Value Method (Ref). w.avg: weighted average (with w = 1/err^2).
T.T: Tholen Tax Class. T.B: Bus & Binzel Tax Class. T T.L: S3OS2 Lazarro (Tholen) Tax Class. T.L B: S3OS2 Lazarro (Bus & Binzel) Tax Class. T.D: DeMeo Tax Class.
Ref: S = SiMDA, C = Carry (2012)
