Summary for : (117) Lomia

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
MBAXCXX | X-11.29 ± 8.42   (X)75 %120.6 ± 19.716.4 %1.04e+19 ± 5.82e+1856 %SEVM
MBAXCXX | X-20.81 ± 10.14   (X)49 %114.3 ± 15.613.7 %1.63e+19 ± 4.29e+1826 %Sw.avg
MBAX3.67 ± 0.48   (B)13 %146.8 ± 4.02.7 %6.08e+18 ± 6.30e+1710 %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
(117) Lomia144.61 ± 5.573.9 % STM2004D94 18.55 1
(117) Lomia148.71 ± 6.594.4 % STM2004D93 18.17 2
(117) Lomia131.54 ± 3.792.9 % STM2010D64 8.30 3
(117) Lomia104.11 ± 0.030.0 % STM2010D642 302886.27 4
(117) Lomia157.70 ± 9.956.3 % NEATM2010D64 13.89 5
(117) Lomia142.54 ± 0.050.0 % NEATM2010D64 192185.25 6
(117) Lomia164.10 ± 3.302.0 % Occ2011D9512 173.60 7
(117) Lomia144.91 ± 1.861.3 % STM2011D83 170.53 8
(117) Lomia173.27 ± 3.532.0 % NEATM2011D7212 222.45 9

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. Occ : Stellar occultation. STM : Standard Thermal Model.


EVM diam. average D = (120.6 ± 19.73) km   (ΔD/D = 16%, SNR = 6.11) Derived bulk density ρ = (11.29 ± 8.42) g/cm3   (Δρ/ρ = 75%, SNR = 1.3)


References
D64(2010):Ryan, E.L., Woodward, C.E., 2010. Rectified Asteroid Albedos and Diameters from IRAS and MSX Photometry Catalogs. Astronomical Journal 140, 933–943.
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.
D83(2011):Usui, F., Kuroda, D., Müller, T.G., Hasegawa, S., Ishiguro, M., Ootsubo, T., Ishihara, D., Kataza, H., Takita, S., Oyabu, S., Ueno, M., Matsuhara, H., Onaka, T., 2011. Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey. Publications of the Astronomical Society of Japan 63, 1117–1138.
D93(2004):Tedesco, E.F., Noah, P.V., Noah, M.C., Price, S.D., 2004. IRAS Minor Planet Survey. NASA Planetary Data System. IRAS-A-FPA-3-RDR-IMPS-V6.0.
D94(2004):Tedesco, E.F., Egan, M.P., Price, S.D., 2004. MSX Infrared Minor Planet Survey. NASA Planetary Data System. MSX-A-SPIRIT3-5-SBN0003-MIMPS-V1.0.
D95(2011):Dunham, D.W., Herald, D., Frappa, E., Hayamizu, T., Talbot, J., Timerson, B., 2011. Asteroid Occultations. NASA Planetary Data System. EAR-A-3-RDR-OCCULTATIONS-V9.0.

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(117) Lomia1.72e+19 ± 1.99e+171 %Ephem 2010M93121175.03 1
(117) Lomia6.36e+18 ± 4.35e+1868 %Deflec 2011M970.85 2
(117) Lomia5.85e+18 ± 3.59e+1861 %Deflec 2011M971.59 3
(117) Lomia6.73e+18 ± 3.55e+1853 %Deflec 2011M971.06 4
(117) Lomia4.88e+18 ± 6.61e+18135 %Deflec 2011M970.69 5
(117) Lomia3.38e+18 ± 7.95e+1724 %OrbFitN 2014M12377.50 6
(117) Lomia9.77e+18 ± 2.93e+1830 %Ephem 2019M1260.04 7

plot, average mass and derived density

All

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).

Deflec : Orbital deflection (close encounter) of one or several test asteroids (classical LSQ). Ephem : Planetary ephemeris solution. OrbFitN : Simultaneous multi-asteroid astrometric orbit solution (similar to 'Ephem').


EVM mass average M = (1.038 ± 0.582) × 1019 kg   (ΔM/M = 56%, SNR = 1.8) Derived bulk density ρ = (11.29 ± 8.42) g/cm3   (Δρ/ρ = 75%, SNR = 1.3)


References
M93(2010):Fienga, A., Manche, H., Kuchynka, P., Laskar, J., Gastineau, M., 2010. INPOP10a. Scientific Notes.
M97(2011):Zielenbach, W., 2011. Mass Determination Studies of 104 Large Asteroids. Astronomical Journal 142, 120–128.
M123(2014):Goffin, E., 2014. Astrometric asteroid masses: a simultaneous determination. Astronomy & Astrophysics, Volume 565, id.A56, 8 pp.
M126(2019):Fienga, A., et. al, 2019. INPOP19a planetary ephemeris. Notes Scientifiques et Techniques de l'Institut de mécanique céleste,