Summary for : (66652) Borasisi

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
TNO--- | --0.08 ± 0.05   (X)61 %447.0 ± 90.020.1 %3.75e+18 ± 4.00e+1711 %SEVM
TNO--- | --0.08 ± 0.05   (X)61 %447.0 ± 90.020.1 %3.75e+18 ± 4.00e+1711 %Sw.avg
TNO-0.08 ± 0.04   (D)50 %447.0 ± 90.020.1 %3.75e+18 ± 4.00e+1711 %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
(66652) Borasisi447.00 ± 90.0020.1 % H-mag2004D16 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 = (447.0 ± 90.00) km   (ΔD/D = 20%, SNR = 4.97) Derived bulk density ρ = (0.08 ± 0.05) g/cm3   (Δρ/ρ = 61%, SNR = 1.6)


References
D16(2004):Noll, K.S., Stephens, D.C., Grundy, W.M., Griffin, I., 2004a. The orbit, mass, and albedo of transneptunian binary (66652) 1999 RZ 253 . Icarus 172, 402–407.

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(66652) Borasisi3.75e+18 ± 4.00e+1711 %BinImg 2004M410.00 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).

BinImg : Binary imaged at optical wavelength.


EVM mass average M = (3.750 ± 0.400) × 1018 kg   (ΔM/M = 11%, SNR = 9.4) Derived bulk density ρ = (0.08 ± 0.05) g/cm3   (Δρ/ρ = 61%, SNR = 1.6)


References
M41(2004):Noll, K.S., Stephens, D.C., Grundy, W.M., Griffin, I., 2004. The orbit, mass, and albedo of transneptunian binary (66652) 1999 RZ 253 . Icarus 172, 402–407.