Summary for : (311066) 2004 DC

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
NEA--- | --1.73 ± 0.49   (C)28 %0.3 ± 0.08.8 %3.57e+10 ± 3.57e+0910 %SEVM
NEA--- | --1.73 ± 0.49   (C)28 %0.3 ± 0.08.8 %3.57e+10 ± 3.57e+0910 %Sw.avg
NEA-1.73 ± 0.49   (C)28 %0.3 ± 0.08.8 %3.57e+10 ± 3.60e+0910 %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
(311066) 2004 DC0.34 ± 0.038.8 % Radar2008D50 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).

Radar : Radar imaging.


EVM diam. average D = (0.3 ± 0.03) km   (ΔD/D = 9%, SNR = 11.33) Derived bulk density ρ = (1.73 ± 0.49) g/cm3   (Δρ/ρ = 28%, SNR = 3.5)


References
D50(2008):Taylor, P.A., Margot, J.L., Nolan, M.C., Benner, L.A.M., Ostro, S.J., Giorgini, J.D., Magri, C., 2008. The Shape, Mutual Orbit, and Tidal Evolution of Binary Near-Earth Asteroid 2004 DC. LPI Contributions 1405, 8322.

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(311066) 2004 DC3.57e+10 ± 3.57e+0910 %BinRad 2008M770.00 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 = (3.570 ± 0.357) × 1010 kg   (ΔM/M = 10%, SNR = 10.0) Derived bulk density ρ = (1.73 ± 0.49) g/cm3   (Δρ/ρ = 28%, SNR = 3.5)


References
M77(2008):Taylor, P.A., Margot, J.L., Nolan, M.C., Benner, L.A.M., Ostro, S.J., Giorgini, J.D., Magri, C., 2008. The Shape, Mutual Orbit, and Tidal Evolution of Binary Near-Earth Asteroid 2004 DC. LPI Contributions 1405, 8322.