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)
Object is a Gaia target for mass determination !
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
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).
Img-TE : Triaxial ellipsoid model from images. NEATM : Near-Earth Asteroid Thermal Model. STM : Standard Thermal Model.
EVM diam. average D = (231.2 ± 8.10) km (ΔD/D = 4%, SNR = 28.54)
Derived bulk density ρ = (1.63 ± 0.46) g/cm3 (Δρ/ρ = 28%, SNR = 3.6)
References
D48
(2008):
Drummond, J.D., Christou, J.C., 2008. Triaxial ellipsoid dimensions and rotational poles of seven asteroids from Lick Observatory adaptive optics images, and of Ceres. Icarus 197, 480–496.
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.
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).
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 = (1.057 ± 0.274) × 1019 kg (ΔM/M = 26%, SNR = 3.9)
Derived bulk density ρ = (1.63 ± 0.46) g/cm3 (Δρ/ρ = 28%, SNR = 3.6)
References
M39
(2004):
Pitjeva, E.V., 2004. Estimations of masses of the largest asteroids and the main asteroid belt from ranging to planets, Mars orbiters and landers, in: J.-P. Paillé (Ed.), 35th COSPAR Scientific Assembly, p. 2014.
M42
(2004):
Kochetova, O.M., 2004. Determination of Large Asteroid Masses by the Dynamical Method. Solar System Research 38, 66–75.
M49
(2005):
Pitjeva, E.V., 2005. High-Precision Ephemerides of Planets - EPM and Determination of Some Astronomical Constants. Solar System Research 39, 176–186.
M56
(2006):
Konopliv, A.S., Yoder, C.F., Standish, E.M., Yuan, D.N., Sjogren, W.L., 2006. A global solution for the Mars static and seasonal gravity, Mars orientation, Phobos and Deimos masses, and Mars ephemeris. Icarus 182, 23–50.
M70
(2008):
Fienga, A., Manche, H., Laskar, J., Gastineau, M., 2008. INPOP06: a new numerical planetary ephemeris. Astronomy and Astrophysics 477, 315–327.
M86
(2009):
Folkner, W.M., Williams, J.G., Boggs, D.H., 2009. The planetary and lunar ephemeris de 421. IPN Progress Report 42, 1–34.
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.
M100
(2011):
Fienga, A., Kuchynka, P., Laskar, J., Manche, H., Gastineau, M., 2011. Asteroid mass determinations with INPOP planetary ephemerides. EPSC-DPS Joint Meeting 2011 , 1879.
M103
(2011):
Konopliv, A.S., Asmar, S.W., Folkner, W.M., Karatekin, Ö., Nunes, D.C., Smrekar, S.E., Yoder, C.F., Zuber, M.T., 2011. Mars high resolution gravity fields from MRO, Mars seasonal gravity, and other dynamical parameters. Icarus 211, 401–428.
M123
(2014):
Goffin, E., 2014. Astrometric asteroid masses: a simultaneous determination. Astronomy & Astrophysics, Volume 565, id.A56, 8 pp.
M125
(2017):
Baer, J., Chesley, S.R., 2017. Simultaneous Mass Determination for Gravitationally Coupled Asteroids. The Astronomical Journal, Volume 154, Issue 2, article id. 76, 11 pp.
M126
(2019):
Fienga, A., et. al, 2019. INPOP19a planetary ephemeris. Notes Scientifiques et Techniques de l'Institut de mécanique céleste,