Size and shape of the trans-Neptunian object (470316) 2007 OC10: Comparison with thermal data

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Volume 697 (May 2025)

A&A, 697 (2025) A157

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Table 3

Results from our MCMC samplings.

Parameter	Sampling 1		Sampling 2

	Prior	Result	Prior	Result
x_c (km)	U[−900, −300]	${- 653}_{- 33}^{+ 66}$ $\[\mathbf{-653}_{-33}^{+66}\]$	U[−900, −300]	$- 652_{- 31}^{+ 40}$ $\[-652_{-31}^{+40}\]$
y_c (km)	U[-500, 400]	$98_{- 180}^{+ 58}$ $\[\mathbf{98}_{-180}^{+58}\]$	U[−500, 400]	$106_{- 100}^{+ 170}$ $\[106_{-100}^{+170}\]$
a (km)	U[100, 300]	$215_{- 7}^{+ 10}$ $\[\mathbf{215}_{-7}^{+10}\]$	N(169, 17)	$211_{- 5}^{+ 11}$ $\[211_{-5}^{+11}\]$
b/a	U[0.0, 1.0]	${0.58}_{- 0.16}^{+ 0.16}$ $\[\mathbf{0.58}_{-0.16}^{+0.16}\]$	N(0.889, 0.143; 0,1)	${0.68}_{- 0.11}^{+ 0.11}$ $\[0.68_{-0.11}^{+0.11}\]$
ϕ (deg)	U[−90, 90]	$16_{- 11}^{+ 12}$ $\[\mathbf{16}_{-11}^{+12}\]$	U[−90, 90]	$17_{- 8}^{+ 9}$ $\[17_{-8}^{+9}\]$
f₁	U[0.5, 1.0]	${0.748}_{- 0.012}^{+ 0.011}$ $\[\mathbf{0.748}_{-0.012}^{+0.011}\]$	U[0.5, 1.0]	${0.747}_{- 0.014}^{+ 0.012}$ $\[0.747_{-0.014}^{+0.012}\]$
x₁ (km)	U[−500, −150]	${- 305}_{- 38}^{+ 31}$ $\[\mathbf{-305}_{-38}^{+31}\]$	U[−500, −150]	$- 307_{- 21}^{+ 24}$ $\[-307_{-21}^{+24}\]$
y₁ (km)	U[−350, 0]	${- 209}_{- 146}^{+ 22}$ $\[\mathbf{-209}_{-146}^{+22}\]$	U[−350, 0]	$- 206_{- 27}^{+ 72}$ $\[-206_{-27}^{+72}\]$

Notes. Sampling 1 is our preferred sampling, with all uniform priors. The second sampling has priors that take into account the projected axis ratio distribution for published occultations in addition to the reported area-equivalent diameter in Santos-Sanz et al. (2012) (see Fig. D.1 for an overview of the posterior pdfs from which these values were obtained; see text).

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