Summary for : (153591) 2001 SN263

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
AMO--- | -C1.01 ± 0.23   (C)23 %2.6 ± 0.27.7 %9.17e+12 ± 2.24e+100 %SEVM
AMO--- | -C1.01 ± 0.23   (C)23 %2.6 ± 0.27.7 %9.17e+12 ± 2.24e+100 %Sw.avg
NEA-0.99 ± 0.22   (C)22 %2.6 ± 0.27.7 %9.17e+12 ± 2.00e+100 %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
(153591) 2001 SN2632.59 ± 0.207.7 % H-mag2011D70 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 = (2.6 ± 0.20) km   (ΔD/D = 8%, SNR = 12.95) Derived bulk density ρ = (1.01 ± 0.23) g/cm3   (Δρ/ρ = 23%, SNR = 4.3)


References
D70(2011):Fang, J., Margot, J.L., Brozovic, M., Nolan, M.C., Benner, L.A.M., Taylor, P.A., 2011. Orbits of Near-Earth Asteroid Triples 2001 SN263 and 1994 CC: Properties, Origin, and Evolution. Astronomical Journal 141, 154–169.

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(153591) 2001 SN2639.17e+12 ± 2.24e+100 %BinRad 2011M960.00 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 = (9.170 ± 0.022) × 1012 kg   (ΔM/M = 0%, SNR = 409.4) Derived bulk density ρ = (1.01 ± 0.23) g/cm3   (Δρ/ρ = 23%, SNR = 4.3)


References
M96(2011):Fang, J., Margot, J.L., Brozovic, M., Nolan, M.C., Benner, L.A.M., Taylor, P.A., 2011. Orbits of Near-Earth Asteroid Triples 2001 SN263 and 1994 CC: Properties, Origin, and Evolution. Astronomical Journal 141, 154–169.