Summary for : (494658) 2000 UG11

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
NEA--- | --0.66 ± 0.67   (E)101 %0.3 ± 0.133.3 %9.35e+09 ± 1.59e+0917 %SEVM
NEA--- | --0.66 ± 0.67   (E)101 %0.3 ± 0.133.3 %9.35e+09 ± 1.59e+0917 %Sw.avg
NEA-0.66 ± 0.67   (E)102 %0.3 ± 0.133.3 %9.35e+09 ± 1.59e+0917 %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:
3D Model | JPL New Horizons | Minor Planet Center | Wikipedia (these auto-generated links might not work)

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)

Diameter estimates

DesignationDiameter / Err (km)ΔD/DMethodYearRefNχ2Use
(494658) 2000 UG110.30 ± 0.1033.3 % H-mag2012D90 0.00 1

Notes (N):
1: This estimate is discarded for the average diameter (and derived density) calculation in Carry (2012).
2: This estimate is discarded for the average diameter (and derived density) calculation in SiMDA (catalog).

H-mag : Crude estimate from absolute magnitude.


EVM diam. average D = (0.3 ± 0.10) km   (ΔD/D = 33%, SNR = 3.00) Derived bulk density ρ = (0.66 ± 0.67) g/cm3   (Δρ/ρ = 101%, SNR = 1.0)


References
D90(2012):MPEC

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(494658) 2000 UG119.35e+09 ± 1.59e+0917 %BinRad 2002M320.00 1

Notes (N):
1: This estimate is discarded for the average mass (and derived density) calculation in Carry (2012).
2: This estimate is discarded for the average mass (and derived density) calculation in SiMDA (catalog).
3: This estimate is an average of individual solutions listed before under the same reference (e.g. M125).

BinRad : Binary imaged with radar.


EVM mass average M = (9.350 ± 1.590) × 109 kg   (ΔM/M = 17%, SNR = 5.9) Derived bulk density ρ = (0.66 ± 0.67) g/cm3   (Δρ/ρ = 101%, SNR = 1.0)


References
M32(2002):Merline, W.J., Weidenschilling, S.J., Durda, D.D., Margot, J.L., Pravec, P., Storrs, A.D., 2002. Asteroids Do Have Satellites. Asteroids III , 289–312.