Summary for : (1467) Mashona

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
OMBGC-Caa | Ch-0.76 ± 0.44   (D)58 %95.2 ± 7.37.7 %3.45e+17 ± 1.83e+1753 %SEVM
OMBGC-Caa | Ch-0.79 ± 0.47   (D)59 %93.9 ± 8.08.5 %3.45e+17 ± 1.83e+1753 %Sw.avg

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
(1467) Mashona104.12 ± 1.061.0 % NEATM2011D722 69.84 1
(1467) Mashona89.16 ± 0.730.8 % NEATM2019D103 69.84 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).

NEATM : Near-Earth Asteroid Thermal Model.


EVM diam. average D = (95.2 ± 7.35) km   (ΔD/D = 8%, SNR = 12.96) Derived bulk density ρ = (0.76 ± 0.44) g/cm3   (Δρ/ρ = 58%, SNR = 1.7)


References
D72(2011):Masiero, J.R., Mainzer, A.K., Grav, T., Bauer, J.M., Cutri, R.M., Dailey, J., Eisenhardt, P.R.M., McMillan, R.S., Spahr, T.B., Skrutskie, M.F., Tholen, D., Walker, R.G., Wright, E.L., DeBaun, E., Elsbury, D., Gautier, IV, T., Gomillion, S., Wilkins, A., 2011. Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters. Astrophysical Journal 741, 68.
D103(2019):Mainzer, A., Bauer, J., Cutri, R., et al., Eds., 2019. NEOWISE Diameters and Albedos V2.0. urn:nasa:pds:neowise_diameters_albedos::2.0. NASA Planetary Data System.

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(1467) Mashona3.45e+17 ± 1.83e+1753 %Ephem 2019M1260.00 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).

Ephem : Planetary ephemeris solution.


EVM mass average M = (3.446 ± 1.830) × 1017 kg   (ΔM/M = 53%, SNR = 1.9) Derived bulk density ρ = (0.76 ± 0.44) g/cm3   (Δρ/ρ = 58%, SNR = 1.7)


References
M126(2019):Fienga, A., et. al, 2019. INPOP19a planetary ephemeris. Notes Scientifiques et Techniques de l'Institut de mécanique céleste,