Summary for : (164121) 2003 YT1

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
NEA--- | --1.95 ± 1.15   (D)59 %1.1 ± 0.216.7 %1.27e+12 ± 3.90e+1131 %SEVM
NEA--- | --1.90 ± 0.60   (C)32 %1.1 ± 0.02.5 %1.27e+12 ± 3.90e+1131 %Sw.avg
NEA-1.90 ± 0.59   (C)31 %1.1 ± 0.00.9 %1.27e+12 ± 3.90e+1131 %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
(164121) 2003 YT11.10 ± 0.2018.2 % Radar2004D15 0.02 1
(164121) 2003 YT11.05 ± 0.3028.6 % Radar2006D26 0.01 2

plot, average diameter and derived density

All

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 = (1.1 ± 0.18) km   (ΔD/D = 17%, SNR = 5.98) Derived bulk density ρ = (1.95 ± 1.15) g/cm3   (Δρ/ρ = 59%, SNR = 1.7)


References
D15(2004):Nolan, M.C., Howell, E.S., Miranda, G., 2004. Radar Images of Binary Asteroid 2003 YT1, in: AAS/Division for Planetary Sciences Meeting Abstracts
D26(2006):Brooks, H.E., 2006. Orbits of Binary Near-Earth Asteroids from Radar Observations, in: AAS/Division for Planetary Sciences Meeting Abstracts

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(164121) 2003 YT11.27e+12 ± 3.90e+1131 %BinRad 2006M520.00 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 = (1.270 ± 0.390) × 1012 kg   (ΔM/M = 31%, SNR = 3.3) Derived bulk density ρ = (1.95 ± 1.15) g/cm3   (Δρ/ρ = 59%, SNR = 1.7)


References
M52(2006):Brooks, H.E., 2006. Orbits of Binary Near-Earth Asteroids from Radar Observations, in: AAS/Division for Planetary Sciences Meeting Abstracts