Summary for : SL9
| Dyn | T.T | T.B | T T.L B | T.D | Density (g/cm^3) | Δρ/ρ | Diameter (km) | ΔD/D | Mass (kg) | ΔM/M | Ref | Avg.M |
|---|
| COM | - | - | - | - | - | 0.51 ± 0.16 (C) | 32 % | 1.8 ± 0.2 | 10.1 % | 1.53e+12 ± 1.53e+11 | 10 % | S | EVM |
| COM | - | - | - | - | - | 0.51 ± 0.16 (C) | 32 % | 1.8 ± 0.2 | 10.1 % | 1.53e+12 ± 1.53e+11 | 10 % | S | w.avg |
| COM | - | 0.50 ± 0.05 (B) | 10 % | 1.8 ± 0.2 | 10.1 % | 1.53e+12 ± 1.50e+11 | 10 % | 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)
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Additional resources:
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)
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(Indirect) density estimates
| Density (g/cm^3) | Δρ/ρ | Method | Year | Ref | N |
|---|
| 0.5 ± 0.05 | 10.0 % | BrkUp | 1994 | BD1 | |
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BrkUp : Break-up modeling (comets).
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References
| BD1 | (1994): | Solem, J.C., 1994. Density and size of comet Shoemaker-Levy 9 deduced from a tidal breakup model. Nature 370, 349–351. |
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Diameter estimates
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).
BrkUp : Break-up modeling.
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EVM diam. average D = (1.8 ± 0.18) km (ΔD/D = 10%, SNR = 9.94)
Derived bulk density ρ = (0.51 ± 0.16) g/cm3 (Δρ/ρ = 32%, SNR = 3.1)
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References
| D1 | (1994): | Solem, J.C., 1994. Density and size of comet Shoemaker-Levy 9 deduced from a tidal breakup model. Nature 370, 349–351. |
Mass estimates
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).
BrkUp : Break-up modeling (comets).
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EVM mass average M = (1.530 ± 0.153) × 1012 kg (ΔM/M = 10%, SNR = 10.0)
Derived bulk density ρ = (0.51 ± 0.16) g/cm3 (Δρ/ρ = 32%, SNR = 3.1)
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References
| M4 | (1994): | Solem, J.C., 1994. Density and size of comet Shoemaker-Levy 9 deduced from a tidal breakup model. Nature 370, 349–351. |
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