Contact Binary Models

This page is maintained by Richard Cannon (richard.cannon@ed.ac.uk). Please reach out if any models have been missed, or information is incorrect.
This table is a simplified version of the table in Cannon et al. (2025).

All non-shape information is taken from the shape publication papers, unless reference is given otherwise as a hyperlink. Shape information (DEEVE, D_eff, etc.) is recalculated from the model files.

Last updated 09/07/2026.



Name Dynamic Class Spectral Type Period [h] D_eq [km] DEEVE 2a [km] DEEVE a/b DEEVE b/c vnc a_2/a_1 V_2/V_1 Lobe Allignment [deg] NP Inertia NP Neck Model File Publication
103P/Hartley 2 Comet -- 16.00 0.12 0.26 3.12 1.13 0.16 0.60 0.39 2.93 0.38 0.38 Available Here Thomas et al. (2013)
(8567) 1996 HW1 NEA Sq 8.76 2.02 4.20 2.84 1.11 0.21 0.62 0.50 13.04 0.71 0.72 Available Here Magri et al. (2011)
(85990) 1999 JV6 NEA Xk 6.54 0.45 0.78 2.27 1.04 0.10 0.60 0.42 20.45 0.20 0.24 Download File Rozek et al. (2019)
(275677) 2000 RS11 NEA Sa 4.45 0.47 0.74 1.80 1.22 0.19 0.78 0.86 56.02 0.46 0.47 Download File Cannon et al. (2026)
(68346) 2001 KZ66 NEA S 4.99 0.80 1.58 2.51 1.24 0.33 0.74 0.38 18.16 0.87 0.89 Download File Zegmott et al. (2021)
(388188) 2006 DP14 NEA E 5.79 0.26 0.52 2.57 1.19 0.20 0.43 0.19 8.47 0.70 0.71 Download File Cannon et al. (2025)
67P/Churyumov-Gerasimenko Comet -- -- 3.28 4.66 1.57 1.15 0.31 0.66 0.44 58.29 0.22 0.64 Available Here Preusker et al. (2017)
(486958) Arrokoth TNO -- 15.94 19.89 38.03 2.28 1.34 0.22 0.75 0.53 4.39 0.89 0.95 Available Here Porter et al. (2024)
(2063) Bacchus NEA Q/C 15.00 0.63 1.11 2.31 1.03 0.08 0.61 0.40 5.49 0.01 0.01 Available Here (1 lobe) Benner et al. (1999)
(4769) Castalia NEA S (ref) 4.07 1.08 1.73 1.86 1.18 0.08 0.93 0.57 23.11 0.12 0.13 Available Here Hudson & Ostro (1994)
(433) Eros NEA S 5.27 16.85 34.76 2.84 1.09 0.16 0.83 0.90 22.71 0.17 0.16 Available Here Miller et al. (2002)
(25143) Itokawa NEA S (ref) 12.13 0.32 0.59 2.25 1.19 0.14 0.42 0.19 18.47 0.09 0.14 Available Here (Gaskell model) Demura et al. (2006)
(216) Kleopatra MBA M 5.39 122.22 310.33 3.67 1.21 0.20 0.90 0.91 2.01 0.46 0.46 Available Here Shepard et al. (2018)
(1981) Midas NEA V 5.22 1.77 3.59 2.36 1.51 0.25 0.84 0.56 21.20 0.55 0.57 Download File McGlasson et al. (2022)
(4486) Mithra NEA S (ref) 67.50 1.69 2.56 1.70 1.20 0.23 0.90 0.61 63.21 0.41 0.39 Available Here Brozovic et al. (2011)
(4179) Toutatis NEA S 178 (NPA) 2.45 4.26 2.10 1.20 0.12 0.42 0.15 9.54 -- 0.13 Available Here (Radar model) Hudson et al. (2003)
(11066) Sigurd NEA S (ref) 8.50 2.14 4.46 2.89 1.08 -- -- -- -- -- -- Not Public Cannon et al. (2025)
(52246) Donaldjohanson MBA C 252 (NPA) 4.80 (estimate) -- -- -- -- -- -- -- -- -- Not Public Marchi et al. (2026)
(85989) 1999 JD6 NEA K 7.66 1.45 3.17 -- -- -- -- -- -- -- -- Not Public Marshall (2017) Thesis
(98943) Torifune NEA S (ref) -- -- -- -- -- -- -- -- -- -- -- Not Public JAXA (2026)
(152830) Dinkinesh I Selam MBA S 52.67 -- -- -- -- -- -- -- -- -- -- Not Public Levison et al. (2024)
(242643) 2005 NZ6 NEA -- -- -- -- -- -- -- -- -- -- -- -- Not Public MacLennan et al. (2025)
(523804) 2000 YF29 NEA -- 6.14 0.30 0.42 1.49 1.26 -- -- -- -- -- -- Not Public Cannon et al. (2025)
2004 XL14 NEA -- 17.00 0.21 0.30 1.40 1.52 -- -- -- -- -- -- Not Public Cannon et al. (2025)
2024 ON NEA -- -- -- -- -- -- -- -- -- -- -- -- Not Public Cannon et al. (2026)
8P/Tuttle Comet -- 10.00 -- -- -- -- -- -- -- -- -- -- Not Public Harmon et al. (2010)