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Summary for : (88) Thisbe

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
MBA	CF	B	- \| -	-	0.03 ± 0.28 (X)	885 %	206.5 ± 8.7	4.2 %	1.48e+17 ± 1.31e+18	885 %	S	EVM
MBA	CF	B	- \| -	-	0.00 ± 1.61 (X)	1715328 %	200.4 ± 6.3	3.1 %	3.96e+14 ± 6.79e+18	1715328 %	S	w.avg
MBA	B				3.44 ± 0.84 (C)	24 %	204.0 ± 9.1	4.5 %	1.53e+19 ± 3.10e+18	20 %	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)

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

Designation	Diameter / Err (km)	ΔD/D	Method	Year	Ref	N	χ²	Use
(88) Thisbe	200.58 ± 5.00	2.5 %	STM	2004	D93		1.40	1
(88) Thisbe	207.88 ± 5.89	2.8 %	STM	2010	D64		0.06	2
(88) Thisbe	223.20 ± 10.22	4.6 %	NEATM	2010	D64		2.67	3
(88) Thisbe	204.00 ± 14.00	6.9 %	MDM:LO	2011	D78		0.03	4
(88) Thisbe	220.00 ± 16.00	7.3 %	MDM:LO	2011	D78		0.71	5
(88) Thisbe	195.58 ± 2.72	1.4 %	STM	2011	D83	2	16.08	6
(88) Thisbe	212.00 ± 10.00	4.7 %	ADAM	2017	D100		0.30	7

plot, average diameter and derived density

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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).

ADAM : All-Data Asteroid Modeling. MDM:LO : Multi-Data Modeling: Lightcurves + Occultations. NEATM : Near-Earth Asteroid Thermal Model. STM : Standard Thermal Model.

EVM diam. average D = (206.5 ± 8.66) km (ΔD/D = 4%, SNR = 23.84) Derived bulk density ρ = (0.03 ± 0.28) g/cm³ (Δρ/ρ = 885%, SNR = 0.1)

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.
D78	(2011):	Ďurech, J., Kaasalainen, M., Herald, D., Dunham, D., Timerson, B., Hanuš, J., Frappa, E., Talbot, J., Hayamizu, T., Warner, B.D., Pilcher, F., Galád, A., 2011. Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes. Icarus 214, 652–670.
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.
D100	(2017):	Hanuš, J., Viikinkoski, M., Marchis, F., et al., 2017. Volumes and bulk densities of forty asteroids from ADAM shape modeling. Astronomy and Astrophysics 601, A114 (2017). DOI: 10.1051/0004-6361/201629956

Mass estimates

Designation	Mass / Err (kg)	ΔM/M	Method	Year	Ref	N	χ²	Use
(88) Thisbe	1.47e+19 (+2.59e+18 / -2.59e+18)	18 % / 18 %	Deflec	2001	M26		31.57	1
(88) Thisbe	1.17e+19 (+2.39e+18 / -2.39e+18)	20 % / 20 %	Deflec	2004	M42		23.36	2
(88) Thisbe	1.05e+19 (+1.79e+18 / -1.79e+18)	17 % / 17 %	Deflec	2008	M72		33.44	3
(88) Thisbe	1.72e+19 (+5.17e+17 / -5.17e+17)	3 % / 3 %	Ephem	2009	M80	2	1087.79	4
(88) Thisbe	1.83e+19 (+1.09e+18 / -1.09e+18)	6 % / 6 %	Deflec	2011	M95	2	277.32	5
(88) Thisbe	9.53e+18 (+3.20e+18 / -3.20e+18)	34 % / 34 %	Deflec	2011	M97		8.60	6
(88) Thisbe	7.61e+18 (+2.27e+18 / -2.27e+18)	30 % / 30 %	Deflec	2011	M97	1	10.80	7
(88) Thisbe	7.63e+18 (+2.25e+18 / -2.25e+18)	29 % / 29 %	Deflec	2011	M97	1	11.06	8
(88) Thisbe	1.01e+19 (+3.98e+17 / -3.98e+17)	4 % / 4 %	OrbFitN	2014	M123		630.23	9
(88) Thisbe	1.04e+19 (+1.81e+17 / -1.81e+17)	2 % / 2 %	Deflec	2017	M125	2	3207.90	10
(88) Thisbe	1.77e+19 (+2.88e+18 / -2.88e+18)	16 % / 16 %	Deflec	2017	M125	2	37.31	11
(88) Thisbe	3.20e+19 (+9.21e+18 / -9.21e+18)	29 % / 29 %	Deflec	2017	M125	2	11.97	12
(88) Thisbe	6.88e+18 (+2.72e+18 / -2.72e+18)	40 % / 40 %	Deflec	2017	M125	2	6.12	13
(88) Thisbe	1.04e+19 (+1.80e+17 / -1.80e+17)	2 % / 2 %	Deflec	2017	M125	3	3256.31	14
(88) Thisbe	3.70e+14 (+1.81e+14 / -1.81e+14)	49 % / 49 %	Ephem	2019	M126	2	669445.32	15
(88) Thisbe	1.21e+19 (+7.24e+18 / -6.38e+18)	60 % / 53 %	Defl-MC	2020	M128		3.08	16
(88) Thisbe	1.48e+19 (+1.98e+19 / -1.18e+19)	134 % / 80 %	Defl-MC	2020	M128	2	0.86	17

plot, average mass and derived density

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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).
4: Values with asymmetric errors are currently just diplayed but disabled (unchecked) for the average calculation.

Defl-MC : Orbital deflection (close encounter) of one or several test asteroids (Markov Chain Monte Carlo, MCMC). 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 = (1.485 ± 13.133) × 10¹⁷ kg (ΔM/M = 885%, SNR = 0.1) Derived bulk density ρ = (0.03 ± 0.28) g/cm³ (Δρ/ρ = 885%, SNR = 0.1)

References

M26	(2001):	Michalak, G., 2001. Determination of asteroid masses. II. (6) Hebe, (10) Hygiea, (15) Eunomia, (52) Europa, (88) Thisbe, (444) Typtis, (511) Davida and (704) Interamnia. Astronomy and Astrophysics 374, 703–711.
M42	(2004):	Kochetova, O.M., 2004. Determination of Large Asteroid Masses by the Dynamical Method. Solar System Research 38, 66–75.
M72	(2008):	Baer, J., Milani, A., Chesley, S.R., Matson, R.D., 2008. An Observational Error Model, and Application to Asteroid Mass Determination, in: Bulletin of the American Astronomical Society, p. 493.
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.
M95	(2011):	Baer, J., Chesley, S.R., Matson, R.D., 2011. Astrometric Masses of 26 Asteroids and Observations on Asteroid Porosity. Astronomical Journal 141, 143–155.
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.
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,
M128	(2020):	Siltala, L., Granvik, M., 2020. Asteroid mass estimation with the robust adaptive Metropolis algorithm. Astronomy & Astrophysics, 633, A46.

Size, Mass and Density of Asteroids (SiMDA)

Summary for : (88) Thisbe

Diameter estimates

Mass estimates