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Home All issues Volume 654 (October 2021) A&A, 654 (2021) A56 Full HTML

Table 1

Taxonomic type, volume-equivalent diameter (D), mass (m), density (ρ), geometric albedo, and c∕a ratio of our large programme targets.

Asteroid Class Family (F) D m ρ Albedo c∕a
Satellite (S) [km] [1018 kg] [g cm−3]
1 Ceres (*) C 939.4 ± 0.2 938.40 ± 0.01 2.161 ± 0.001 0.096 0.9247 ± 0.0003
2 Pallas B F 511 ± 4 204.2 ± 2.7 2.92 ± 0.08 0.155 0.79 ± 0.03
3 Juno S F 254 ± 2 27.0 ± 2.4 3.15 ± 0.28 0.202 0.78 ± 0.02
4 Vesta (*) V F 523.2 ± 0.2 259.0 ± 0.1 3.453 ± 0.004 0.38 0.7769 ± 0.0004
6 Hebe S 195 ± 3 12.4 ± 2.4 3.18 ± 0.64 0.268 0.75 ± 0.04
7 Iris S 199 ± 10 13.5 ± 2.3 3.26 ± 0.74 0.279 0.58 ± 0.07
8 Flora S F 146 ± 2 4.0 ± 1.6 2.4 ± 1.0 0.224 0.82 ± 0.05
9 Metis K 173 ± 2 8.0 ± 1.9 2.94 ± 0.70 0.18 0.61 ± 0.05
10 Hygiea C F 433 ± 8 87.4 ± 6.9 2.06 ± 0.20 0.063 0.94 ± 0.05
11 Parthenope S F 149 ± 2 5.5 ± 0.4 3.20 ± 0.27 0.187 0.88 ± 0.05
12 Victoria A 116 ± 2 2.7 ± 1.3 3.4 ± 1.7 0.167 0.69 ± 0.03
13 Egeria Ch 202 ± 3 9.2 ± 2.1 2.13 ± 0.49 0.087 0.76 ± 0.06
15 Eunomia S 270 ± 3 30.5 ± 1.9 2.96 ± 0.21 0.187 0.67 ± 0.05
16 Psyche M/Xk 223 ± 3 22.6 ± 2.9 3.89 ± 0.53 0.155 0.59 ± 0.02
18 Melpomene S 141 ± 2 4.5 ± 0.9 3.06 ± 0.62 0.221 0.81 ± 0.06
19 Fortuna Ch 211 ± 2 8.8 ± 1.4 1.80 ± 0.29 0.056 0.79 ± 0.05
21 Lutetia (*) M/Xc 98 ± 2 1.70 ± 0.02 3.45 ± 0.21 0.194 0.65 ± 0.03
22 Kalliope M/X S 150 ± 5 7.7 ± 0.4 4.36 ± 0.50 0.198 0.59 ± 0.02
24 Themis C F 208 ± 3 6.2 ± 2.9 1.31 ± 0.62 0.06 0.76 ± 0.08
29 Amphitrite S 204 ± 2 12.7 ± 2.0 2.86 ± 0.45 0.194 0.82 ± 0.03
30 Urania S 88 ± 2 1.3 ± 0.9 3.7 ± 2.7 0.214 0.68 ± 0.05
31 Euphrosyne C F/S 268 ± 4 16.5 ± 2.6 1.64 ± 0.27 0.05 0.86 ± 0.07
41 Daphne Ch S 187 ± 13 6.1 ± 0.9 1.78 ± 0.45 0.052 0.65 ± 0.08
45 Eugenia C S 188 ± 2 5.8 ± 0.1 1.66 ± 0.07 0.065 0.55 ± 0.03
48 Doris Ch 215 ± 3 6.9 ± 2.9 1.32 ± 0.55 0.066 0.72 ± 0.01
51 Nemausa Cgh 150 ± 3 3.9 ± 1.6 2.2 ± 0.9 0.09 0.77 ± 0.04
52 Europa C 319 ± 4 23.9 ± 3.8 1.41 ± 0.23 0.052 0.67 ± 0.04
63 Ausonia S 93 ± 3 1.2 ± 0.2 2.96 ± 0.61 0.195 0.45 ± 0.02
87 Sylvia X/P F/S 274 ± 4 14.3 ± 0.5 1.33 ± 0.07 0.04 0.53 ± 0.02
88 Thisbe C 218 ± 3 11.6 ± 2.2 2.14 ± 0.42 0.057 0.81 ± 0.07
89 Julia S F 140 ± 3 4.3 ± 3.2 3.0 ± 2.2 0.216 0.7 ± 0.03
128 Nemesis C F 163 ± 5 3.4 ± 1.7 1.5 ± 0.8 0.067 0.83 ± 0.04
130 Elektra Ch S 199 ± 2 6.4 ± 0.2 1.55 ± 0.07 0.067 0.57 ± 0.04
145 Adeona Ch F 144 ± 3 2.4 ± 0.3 1.52 ± 0.21 0.048 0.92 ± 0.03
173 Ino Xc 145 ± 3 2.2 ± 1.3 1.4 ± 0.8 0.061 0.76 ± 0.06
187 Lamberta Ch 141 ± 2 1.9 ± 0.3 1.28 ± 0.22 0.052 0.86 ± 0.07
216 Kleopatra M/Xe S 118 ± 2 3.0 ± 0.3 3.45 ± 0.41 0.152 0.18 ± 0.02
230 Athamantis S 118 ± 2 2.3 ± 1.1 2.7 ± 1.3 0.146 0.76 ± 0.07
324 Bamberga C 227 ± 3 10.2 ± 0.9 1.67 ± 0.16 0.06 0.96 ± 0.05
354 Eleonora A 165 ± 3 7.5 ± 2.7 3.18 ± 1.14 0.172 0.75 ± 0.08
511 Davida C 298 ± 4 26.6 ± 7.3 1.92 ± 0.53 0.063 0.7 ± 0.06
704 Interamnia C 332 ± 5 35.2 ± 5.1 1.84 ± 0.28 0.067 0.86 ± 0.03

Notes. Uncertainties correspond to 1σ values. We also highlight the bodies visited by spacecraft (*), that are members of a collisional family (F) or that possess one or two satellites (S). Apart from the three targets visited by a space mission (Ceres, Vesta and Lutetia), all reported values were derived in the present study.

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