Summary for : (139) Juewa

DynT.TT.BT T.L B T.DDensity (g/cm^3)Δρ/ρDiameter (km)ΔD/DMass (kg)ΔM/MRefAvg.M
MBACPX- | --7.88 ± 3.60   (C)46 %109.0 ± 7.56.9 %5.34e+18 ± 2.18e+1841 %SEVM
MBACPX- | --8.50 ± 6.01   (X)71 %107.9 ± 22.520.8 %5.60e+18 ± 1.85e+1833 %Sw.avg
MBAX2.51 ± 1.05   (C)42 %161.4 ± 7.44.6 %5.54e+18 ± 2.20e+1840 %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
(139) Juewa156.60 ± 2.791.8 % STM2004D932 291.10 1
(139) Juewa149.52 ± 5.733.8 % STM2004D942 50.01 2
(139) Juewa132.28 ± 3.562.7 % STM2010D642 42.77 3
(139) Juewa107.92 ± 0.010.0 % STM2010D642 11617.01 4
(139) Juewa170.79 ± 7.894.6 % NEATM2010D64 61.34 5
(139) Juewa166.69 ± 2.771.7 % STM2011D83 433.78 6
(139) Juewa164.00 ± 25.2015.4 % NEATM2011D72 4.76 7

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. STM : Standard Thermal Model.


EVM diam. average D = (109.0 ± 7.48) km   (ΔD/D = 7%, SNR = 14.58) Derived bulk density ρ = (7.88 ± 3.60) g/cm3   (Δρ/ρ = 46%, SNR = 2.2)


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.

Mass estimates

DesignationMass / Err (kg)ΔM/MMethodYearRefNχ2Use
(139) Juewa7.14e+18 ± 1.99e+173 %Ephem 2009M8081.42 1
(139) Juewa2.82e+18 ± 2.82e+1710 %Ephem 2009M86280.13 2
(139) Juewa1.17e+19 ± 6.59e+1856 %Ephem 2010M930.93 3
(139) Juewa7.32e+18 ± 4.27e+1858 %Deflec 2011M970.21 4
(139) Juewa4.37e+18 ± 3.25e+1874 %Deflec 2011M970.09 5
(139) Juewa6.00e+18 ± 3.21e+1854 %Deflec 2011M970.04 6
(139) Juewa7.86e+18 ± 4.83e+1861 %Deflec 2011M970.27 7
(139) Juewa5.96e+18 ± 5.97e+1710 %OrbFitN 2014M1231.08 8
(139) Juewa2.72e+18 ± 7.31e+1727 %Ephem 2019M126212.94 9

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 = (5.344 ± 2.175) × 1018 kg   (ΔM/M = 41%, SNR = 2.5) Derived bulk density ρ = (7.88 ± 3.60) g/cm3   (Δρ/ρ = 46%, SNR = 2.2)


References
M80(2009):Fienga, A., Laskar, J., Morley, T., Manche, H., Kuchynka, P., Le Poncin-Lafitte, C., Budnik, F., Gastineau, M., Somenzi, L., 2009. INPOP08, a 4-D planetary ephemeris: from asteroid and time-scale computations to ESA Mars Express and Venus Express contributions. Astronomy and Astrophysics 507, 1675–1686.
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.
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,