Table 3: Spectral slopes, orbital parameters and absolute magnitude of the sample of featureless ACOs, and the D-type inner main-belt, Hilda, Trojan and Cybele asteroids. I is the inclination respect to the orbit of Jupiter.
Object S'_V S'_N I [ $^{\rm o}$ ] e a [AU] H T Class.

(65) Cybele 0.95 $\ddagger$ - 3.548 0.1046 3.4348 6.62 3.106 Cybele

(87) Sylvia 4.14 $\ddagger$ - 10.856 0.0796 3.4904 6.94 3.078 Cybele

(107) Camilla 2.04 $\ddagger$ - 10.048 0.0789 3.4785 7.08 3.084 Cybele

(168) Sibylla 0.95 $\ddagger$ - 4.634 0.0669 3.3753 7.94 3.121 Cybele

(225) Henrietta -2.43 - 20.903 0.2677 3.3829 8.72 3.001 ACO

(229) Adelinda 0.74 $\ddagger$ - 2.092 0.1469 3.4130 9.13 3.102 Cybele

(260) Huberta 3.16 $\ddagger$ - 6.442 0.1219 3.4475 8.97 3.095 Cybele

(414) Liriope 0.96 $\ddagger$ - 9.542 0.0691 3.5081 9.49 3.082 Cybele

(522) Helga 3.09 $\ddagger$ - 4.436 0.0742 3.6306 9.12 3.076 Cybele

(536) Merapi 3.05 $\ddagger$ - 19.380 0.0809 3.5053 8.08 3.016 Cybele

(713) Luscinia 1.25 $\ddagger$ - 10.327 0.1672 3.4001 8.97 3.079 Cybele

(721) Tabora 6.89 $\ddagger$ - 8.344 0.1085 3.5593 9.26 3.072 Cybele

(790) Pretoria 3.95 $\ddagger$ - 20.549 0.1505 3.4098 8.00 3.011 Cybele

(911) Agamemnon 6.76 $\ddagger$ - 21.791 0.0659 5.2513 7.80 2.868 Trojan

(1004) Belopolskya 4.66 $\ddagger$ - 2.977 0.0827 3.4058 9.99 3.115 Cybele

(1028) Lydina 1.17 $\ddagger$ - 9.391 0.1189 3.3964 9.43 3.095 Cybele

(1143) Odysseus 12.56 $\ddagger$ - 3.135 0.0904 5.2576 7.93 2.992 Trojan

(1154) Astronomia 3.72 $\ddagger$ - 4.559 0.0739 3.3868 10.51 3.118 Cybele

(1177) Gonnessia 0.87 $\ddagger$ - 15.103 0.0259 3.3489 9.30 3.085 Cybele

(1266) Tone 6.55 $\ddagger$ - 17.180 0.0472 3.3604 9.41 3.066 Cybele

(1280) Baillauda 4.33 $\ddagger$ - 6.458 0.0615 3.4102 10.33 3.111 Cybele

(1328) Devota 14.22 $\ddagger$ - 5.770 0.1453 3.4916 10.31 3.083 Cybele

(1345) Potomac 3.62 3.49 11.399 0.1806 3.9817 9.73 2.993 Hilda

(1362) Griqua -0.74 $\ddagger$ 0.68 24.206 0.3696 3.2207 11.18 2.962 ACO

(1373) Cincinnati 3.52 $\ddagger$ - 38.968 0.3164 3.4157 11.20 2.740 ACO

(1529) Oterma 8.61 7.67 9.054 0.1999 3.9889 10.05 2.999 Hilda

(1556) Wingolfia 5.73 $\ddagger$ - 15.770 0.1178 3.4181 10.55 3.056 Cybele

(1574) Meyer 10.66 $\ddagger$ - 14.512 0.0391 3.5362 10.30 3.053 Cybele

(1579) Herrick -1.24 $\ddagger$ - 8.780 0.1319 3.4309 10.68 3.088 Cybele

(1542) Schalen 10.51 9.17 2.763 0.1090 3.0973 10.30 3.211 D-Type

(1749) Telamon 10.79 $\ddagger$ - 6.088 0.1077 5.1732 9.20 2.982 Trojan

(1754) Cunningham 4.31 2.92 12.121 0.1669 3.9473 9.77 2.997 Hilda

(1796) Riga 2.03 $\ddagger$ - 22.668 0.0626 3.3488 9.84 3.017 Cybele

(1841) Masaryk 3.06 $\ddagger$ - 2.632 0.0910 3.4276 10.80 3.110 Cybele

(1922) Zulu - 5.59 35.429 0.4801 3.2397 12.20 2.752 ACO

(2246) Bowell - 6.40 6.496 0.0932 3.9542 10.56 3.040 Hilda

(2266) Tchaikovsky 9.65 $\ddagger$ - 13.245 0.1856 3.3951 10.80 3.060 Cybele

(2363) Cebriones 12.43 5.52 32.197 0.0348 5.1599 9.11 2.693 Trojan

(2569) Madeline - 11.14 11.477 0.1624 2.6261 11.20 3.147 D-Type

(2634) James Bradley 3.00 $\ddagger$ - 6.402 0.0546 3.4552 10.20 3.103 Cybele

(2891) McGetchin 9.83 $\ddagger$ - 9.333 0.1277 3.3582 11.20 3.101 Cybele

(2906) Caltech 1.82 $\ddagger$ - 30.690 0.1141 3.1616 10.00 2.995 ACO

(2920) Automedon 9.24 $\ddagger$ - 21.117 0.0262 5.1156 8.80 2.880 Trojan

(2938) Hopi 1.51 2.80 41.409 0.3325 3.1473 11.50 2.775 ACO

(3015) Candy 7.26 $\ddagger$ - 17.426 0.1646 3.3965 11.10 3.037 Cybele

(3063) Makhaon 8.49 $\ddagger$ - 12.178 0.0592 5.1825 8.60 2.961 Trojan

(3141) Buchar 10.19 $\ddagger$ - 10.932 0.0769 3.4035 10.50 3.094 Cybele

(3248) Farinella 11.10 6.05 10.868 0.1553 3.2066 10.70 3.145 D-Type

(3451) Mentor 1.45 $\dagger$ - 24.701 0.0689 5.0935 8.10 2.830 Trojan

(3552) Don Quixote 16.22 $\dagger$ - 30.853 0.7128 4.2311 13.00 2.330 ACO

(3688) Navajo 2.66 1.90 2.560 0.4786 3.2219 14.90 2.996 ACO

(3709) Polypoites 11.64 $\ddagger$ - 19.604 0.0611 5.2616 9.00 2.895 Trojan

(3793) Leonteus 7.39 $\ddagger$ - 20.930 0.0897 5.1922 8.80 2.875 Trojan

(4035) 1986 WD 8.79 $\ddagger$ - 12.135 0.0562 5.2782 9.30 2.962 Trojan

(4060) Deipylos 0.07 $\ddagger$ - 16.145 0.1548 5.2593 8.90 2.910 Trojan

(4063) Euforbo 7.81 $\ddagger$ - 18.949 0.1181 5.1683 8.60 2.892 Trojan

(4068) Menestheus 10.07 $\ddagger$ - 17.526 0.0738 5.1930 9.40 2.915 Trojan

(4489) 1988 AK 8.63 $\ddagger$ - 22.157 0.0598 5.2794 9.00 2.864 Trojan

(4744) 1988 RF₅ 13.19 8.50 10.177 0.1864 2.7976 11.10 3.034 D-Type

(4833) Meges 11.67 $\ddagger$ - 34.672 0.0921 5.2579 9.10 2.657 Trojan

(4835) 1989 BQ 8.35 $\ddagger$ - 19.582 0.2509 5.1867 9.80 2.837 Trojan

(4837) Bickerton -1.01 - 28.223 0.1307 3.2004 11.60 3.012 ACO

(4902) Thessandrus 8.14 $\ddagger$ - 9.071 0.0426 5.2095 9.60 2.981 Trojan

(4997) Ksana -1.37 $\ddagger$ - 32.852 0.3303 2.8662 11.90 3.001 ACO

(5264) Telephus 10.21 $\ddagger$ - 33.583 0.1113 5.2025 9.50 2.676 Trojan

(5301) Novobranets 1.11 $\ddagger$ - 10.024 0.0989 3.3658 11.30 3.102 Cybele

(5362) 1978 CH 7.15 $\ddagger$ - 6.153 0.0177 3.3853 11.50 3.119 Cybele

(5648) 1990 VU₁ 13.46 $\ddagger$ - 22.674 0.1642 5.1766 9.20 2.835 Trojan

(5914) Kathywhaler 8.74 $\ddagger$ - 10.385 0.0863 3.5455 10.80 3.069 Cybele

(6057) Robbia 2.35 $\ddagger$ - 17.872 0.1018 3.3250 11.10 3.062 Cybele

(6144) 1994 EQ₃ 7.54 6.11 5.864 0.3607 4.7736 11.50 2.871 ACO

(6909) Levison 1.98 0.96 37.995 0.4669 2.7246 14.10 2.935 ACO

(7604) Kridsadaporn -0.87 $\ddagger$ - 20.448 0.5736 3.1136 13.70 2.868 ACO

(8373) Stephengould 14.84 2.92 40.782 0.5540 3.2816 13.80 2.606 ACO

(10739) Lowman 2.17 - 20.056 0.3977 3.1416 14.50 3.006 ACO

(14409) 1991 RM₁ 1.17 3.01 27.915 0.2173 3.1932 11.60 2.996 ACO

(18898) 2000 JX 5.26 2.74 26.283 0.3123 3.1819 12.50 2.982 ACO

(19748) 2000 BD₅ 5.20 3.37 27.131 0.1857 3.2098 11.50 3.010 ACO

(20898) Fountainhills 12.69 4.63 45.512 0.4651 4.2275 11.00 2.374 ACO

(22653) 1998 QW₂ - 0.03 45.776 0.1826 2.7488 13.60 2.912 ACO

(22714) 1998 SR₂ 4.54 2.37 26.965 0.2028 3.2069 12.60 3.008 ACO

(23186) 2000 PO₈ 10.80 6.98 13.049 0.1263 4.0130 11.10 2.994 Hilda

(24689) 1990 OH₁ -0.01 - 27.456 0.2958 3.1332 12.80 2.999 ACO

(44566) 1999 CK₁₀₃ 5.19 3.36 25.430 0.2128 3.3288 11.60 2.989 ACO

(65996) 1998 MX₅ 2.61 2.34 9.706 0.6115 2.9171 18.50 2.955 ACO

(85490) 1997 SE₅ 6.83 $\dagger$ - 2.609 0.6664 3.7307 14.80 2.657 ACO

(102528) 1999 US₃ 3.52 3.24 28.987 0.5194 2.7604 13.70 2.986 ACO

1992 UB 6.19 $\dagger$ - 15.931 0.5804 3.0749 15.98 2.903 ACO

1999 SE₁₀ 2.37 $\dagger$ - 6.888 0.6198 3.2146 20.04 2.846 ACO

2000 PG₃ 11.37 $\dagger$ - 20.455 0.8584 2.8272 15.81 2.554 ACO

2000 WL₁₀ 2.29 $\dagger$ - 10.204 0.7152 3.1529 17.99 2.725 ACO

2001 TX₁₆ 3.91 $\dagger$ - 8.135 0.5975 3.5856 13.90 2.773 ACO

2001 UC₅ 3.63 $\dagger$ - 30.391 0.6246 2.7243 21.32 2.897 ACO

2001 UU₉₂ 5.57 $\dagger$ - 5.382 0.6684 3.1675 19.91 2.800 ACO

2004 JR₁ 1.05 - 28.609 0.5940 2.8874 17.56 2.866 ACO

**Table 3:** Spectral slopes, orbital parameters and absolute magnitude of the sample of featureless ACOs, and the D-type inner main-belt, Hilda, Trojan and Cybele asteroids. I is the inclination respect to the orbit of Jupiter.
Object	S'_V	S'_N	I [ $^{\rm o}$ ]	e	a [AU]	H	T	Class.
(65) Cybele	0.95 $\ddagger$	-	3.548	0.1046	3.4348	6.62	3.106	Cybele
(87) Sylvia	4.14 $\ddagger$	-	10.856	0.0796	3.4904	6.94	3.078	Cybele
(107) Camilla	2.04 $\ddagger$	-	10.048	0.0789	3.4785	7.08	3.084	Cybele
(168) Sibylla	0.95 $\ddagger$	-	4.634	0.0669	3.3753	7.94	3.121	Cybele
(225) Henrietta	-2.43	-	20.903	0.2677	3.3829	8.72	3.001	ACO
(229) Adelinda	0.74 $\ddagger$	-	2.092	0.1469	3.4130	9.13	3.102	Cybele
(260) Huberta	3.16 $\ddagger$	-	6.442	0.1219	3.4475	8.97	3.095	Cybele
(414) Liriope	0.96 $\ddagger$	-	9.542	0.0691	3.5081	9.49	3.082	Cybele
(522) Helga	3.09 $\ddagger$	-	4.436	0.0742	3.6306	9.12	3.076	Cybele
(536) Merapi	3.05 $\ddagger$	-	19.380	0.0809	3.5053	8.08	3.016	Cybele
(713) Luscinia	1.25 $\ddagger$	-	10.327	0.1672	3.4001	8.97	3.079	Cybele
(721) Tabora	6.89 $\ddagger$	-	8.344	0.1085	3.5593	9.26	3.072	Cybele
(790) Pretoria	3.95 $\ddagger$	-	20.549	0.1505	3.4098	8.00	3.011	Cybele
(911) Agamemnon	6.76 $\ddagger$	-	21.791	0.0659	5.2513	7.80	2.868	Trojan
(1004) Belopolskya	4.66 $\ddagger$	-	2.977	0.0827	3.4058	9.99	3.115	Cybele
(1028) Lydina	1.17 $\ddagger$	-	9.391	0.1189	3.3964	9.43	3.095	Cybele
(1143) Odysseus	12.56 $\ddagger$	-	3.135	0.0904	5.2576	7.93	2.992	Trojan
(1154) Astronomia	3.72 $\ddagger$	-	4.559	0.0739	3.3868	10.51	3.118	Cybele
(1177) Gonnessia	0.87 $\ddagger$	-	15.103	0.0259	3.3489	9.30	3.085	Cybele
(1266) Tone	6.55 $\ddagger$	-	17.180	0.0472	3.3604	9.41	3.066	Cybele
(1280) Baillauda	4.33 $\ddagger$	-	6.458	0.0615	3.4102	10.33	3.111	Cybele
(1328) Devota	14.22 $\ddagger$	-	5.770	0.1453	3.4916	10.31	3.083	Cybele
(1345) Potomac	3.62	3.49	11.399	0.1806	3.9817	9.73	2.993	Hilda
(1362) Griqua	-0.74 $\ddagger$	0.68	24.206	0.3696	3.2207	11.18	2.962	ACO
(1373) Cincinnati	3.52 $\ddagger$	-	38.968	0.3164	3.4157	11.20	2.740	ACO
(1529) Oterma	8.61	7.67	9.054	0.1999	3.9889	10.05	2.999	Hilda
(1556) Wingolfia	5.73 $\ddagger$	-	15.770	0.1178	3.4181	10.55	3.056	Cybele
(1574) Meyer	10.66 $\ddagger$	-	14.512	0.0391	3.5362	10.30	3.053	Cybele
(1579) Herrick	-1.24 $\ddagger$	-	8.780	0.1319	3.4309	10.68	3.088	Cybele
(1542) Schalen	10.51	9.17	2.763	0.1090	3.0973	10.30	3.211	D-Type
(1749) Telamon	10.79 $\ddagger$	-	6.088	0.1077	5.1732	9.20	2.982	Trojan
(1754) Cunningham	4.31	2.92	12.121	0.1669	3.9473	9.77	2.997	Hilda
(1796) Riga	2.03 $\ddagger$	-	22.668	0.0626	3.3488	9.84	3.017	Cybele
(1841) Masaryk	3.06 $\ddagger$	-	2.632	0.0910	3.4276	10.80	3.110	Cybele
(1922) Zulu	-	5.59	35.429	0.4801	3.2397	12.20	2.752	ACO
(2246) Bowell	-	6.40	6.496	0.0932	3.9542	10.56	3.040	Hilda
(2266) Tchaikovsky	9.65 $\ddagger$	-	13.245	0.1856	3.3951	10.80	3.060	Cybele
(2363) Cebriones	12.43	5.52	32.197	0.0348	5.1599	9.11	2.693	Trojan
(2569) Madeline	-	11.14	11.477	0.1624	2.6261	11.20	3.147	D-Type
(2634) James Bradley	3.00 $\ddagger$	-	6.402	0.0546	3.4552	10.20	3.103	Cybele
(2891) McGetchin	9.83 $\ddagger$	-	9.333	0.1277	3.3582	11.20	3.101	Cybele
(2906) Caltech	1.82 $\ddagger$	-	30.690	0.1141	3.1616	10.00	2.995	ACO
(2920) Automedon	9.24 $\ddagger$	-	21.117	0.0262	5.1156	8.80	2.880	Trojan
(2938) Hopi	1.51	2.80	41.409	0.3325	3.1473	11.50	2.775	ACO
(3015) Candy	7.26 $\ddagger$	-	17.426	0.1646	3.3965	11.10	3.037	Cybele
(3063) Makhaon	8.49 $\ddagger$	-	12.178	0.0592	5.1825	8.60	2.961	Trojan
(3141) Buchar	10.19 $\ddagger$	-	10.932	0.0769	3.4035	10.50	3.094	Cybele
(3248) Farinella	11.10	6.05	10.868	0.1553	3.2066	10.70	3.145	D-Type
(3451) Mentor	1.45 $\dagger$	-	24.701	0.0689	5.0935	8.10	2.830	Trojan
(3552) Don Quixote	16.22 $\dagger$	-	30.853	0.7128	4.2311	13.00	2.330	ACO
(3688) Navajo	2.66	1.90	2.560	0.4786	3.2219	14.90	2.996	ACO
(3709) Polypoites	11.64 $\ddagger$	-	19.604	0.0611	5.2616	9.00	2.895	Trojan
(3793) Leonteus	7.39 $\ddagger$	-	20.930	0.0897	5.1922	8.80	2.875	Trojan
(4035) 1986 WD	8.79 $\ddagger$	-	12.135	0.0562	5.2782	9.30	2.962	Trojan
(4060) Deipylos	0.07 $\ddagger$	-	16.145	0.1548	5.2593	8.90	2.910	Trojan
(4063) Euforbo	7.81 $\ddagger$	-	18.949	0.1181	5.1683	8.60	2.892	Trojan
(4068) Menestheus	10.07 $\ddagger$	-	17.526	0.0738	5.1930	9.40	2.915	Trojan
(4489) 1988 AK	8.63 $\ddagger$	-	22.157	0.0598	5.2794	9.00	2.864	Trojan
(4744) 1988 RF₅	13.19	8.50	10.177	0.1864	2.7976	11.10	3.034	D-Type
(4833) Meges	11.67 $\ddagger$	-	34.672	0.0921	5.2579	9.10	2.657	Trojan
(4835) 1989 BQ	8.35 $\ddagger$	-	19.582	0.2509	5.1867	9.80	2.837	Trojan
(4837) Bickerton	-1.01	-	28.223	0.1307	3.2004	11.60	3.012	ACO
(4902) Thessandrus	8.14 $\ddagger$	-	9.071	0.0426	5.2095	9.60	2.981	Trojan
(4997) Ksana	-1.37 $\ddagger$	-	32.852	0.3303	2.8662	11.90	3.001	ACO
(5264) Telephus	10.21 $\ddagger$	-	33.583	0.1113	5.2025	9.50	2.676	Trojan
(5301) Novobranets	1.11 $\ddagger$	-	10.024	0.0989	3.3658	11.30	3.102	Cybele
(5362) 1978 CH	7.15 $\ddagger$	-	6.153	0.0177	3.3853	11.50	3.119	Cybele
(5648) 1990 VU₁	13.46 $\ddagger$	-	22.674	0.1642	5.1766	9.20	2.835	Trojan
(5914) Kathywhaler	8.74 $\ddagger$	-	10.385	0.0863	3.5455	10.80	3.069	Cybele
(6057) Robbia	2.35 $\ddagger$	-	17.872	0.1018	3.3250	11.10	3.062	Cybele
(6144) 1994 EQ₃	7.54	6.11	5.864	0.3607	4.7736	11.50	2.871	ACO
(6909) Levison	1.98	0.96	37.995	0.4669	2.7246	14.10	2.935	ACO
(7604) Kridsadaporn	-0.87 $\ddagger$	-	20.448	0.5736	3.1136	13.70	2.868	ACO
(8373) Stephengould	14.84	2.92	40.782	0.5540	3.2816	13.80	2.606	ACO
(10739) Lowman	2.17	-	20.056	0.3977	3.1416	14.50	3.006	ACO
(14409) 1991 RM₁	1.17	3.01	27.915	0.2173	3.1932	11.60	2.996	ACO
(18898) 2000 JX	5.26	2.74	26.283	0.3123	3.1819	12.50	2.982	ACO
(19748) 2000 BD₅	5.20	3.37	27.131	0.1857	3.2098	11.50	3.010	ACO
(20898) Fountainhills	12.69	4.63	45.512	0.4651	4.2275	11.00	2.374	ACO
(22653) 1998 QW₂	-	0.03	45.776	0.1826	2.7488	13.60	2.912	ACO
(22714) 1998 SR₂	4.54	2.37	26.965	0.2028	3.2069	12.60	3.008	ACO
(23186) 2000 PO₈	10.80	6.98	13.049	0.1263	4.0130	11.10	2.994	Hilda
(24689) 1990 OH₁	-0.01	-	27.456	0.2958	3.1332	12.80	2.999	ACO
(44566) 1999 CK₁₀₃	5.19	3.36	25.430	0.2128	3.3288	11.60	2.989	ACO
(65996) 1998 MX₅	2.61	2.34	9.706	0.6115	2.9171	18.50	2.955	ACO
(85490) 1997 SE₅	6.83 $\dagger$	-	2.609	0.6664	3.7307	14.80	2.657	ACO
(102528) 1999 US₃	3.52	3.24	28.987	0.5194	2.7604	13.70	2.986	ACO
1992 UB	6.19 $\dagger$	-	15.931	0.5804	3.0749	15.98	2.903	ACO
1999 SE₁₀	2.37 $\dagger$	-	6.888	0.6198	3.2146	20.04	2.846	ACO
2000 PG₃	11.37 $\dagger$	-	20.455	0.8584	2.8272	15.81	2.554	ACO
2000 WL₁₀	2.29 $\dagger$	-	10.204	0.7152	3.1529	17.99	2.725	ACO
2001 TX₁₆	3.91 $\dagger$	-	8.135	0.5975	3.5856	13.90	2.773	ACO
2001 UC₅	3.63 $\dagger$	-	30.391	0.6246	2.7243	21.32	2.897	ACO
2001 UU₉₂	5.57 $\dagger$	-	5.382	0.6684	3.1675	19.91	2.800	ACO
2004 JR₁	1.05	-	28.609	0.5940	2.8874	17.56	2.866	ACO

$\dagger$ Spectrum from the SMASS.
$\ddagger$ Spectrum from the S3OS2.

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