Multivariable statistical analysis of spectrophotometry and spectra of (162173) Ryugu as observed by JAXA Hayabusa2 mission

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Table 2

Mean values of the reflectance normalized at 2001 nm and standard deviation for 24 NIRS3 wavelengths of the groups obtained at both confidence level values (3σ and 2σ) based on the analyzed NIRS3 data of July 19, 2018.

Confidence level	3σ	3σ	2σ	2σ	2σ	2σ	2σ
Groups	#1	#2	#1	#2	#3	#4	# 5

Numbers of sample	12 994	307	11 207	1387	363	271	111

Wavelength (nm)

1928.7	0.993	0.993	0.993	0.993	0.993	0.992	0.993
	±0.004	±0.004	±0.003	±0.004	±0.004	±0.003	±0.005

2055.8	1.028	1.031	1.028	1.030	1.030	1.025	1.031
	±0.004	±0.004	±0.004	±0.004	±0.004	±0.004	±0.004

2182.4	1.032	1.040	1.031	1.037	1.039	1.025	1.041
	±0.005	±0.005	±0.004	±0.004	±0.005	±0.004	±0.006

2308.5	1.054	1.071	1.053	1.064	1.069	1.042	1.075
	±0.007	±0.005	±0.006	±0.005	±0.005	±0.004	±0.007

2434.2	1.089	1.120	1.087	1.107	1.118	1.069	1.130
	±0.011	±0.006	±0.008	±0.006	±0.006	±0.005	±0.008

2559.4	1.116	1.162	1.113	1.142	1.159	1.087	1.177
	±0.016	±0.008	±0.012	±0.007	±0.007	±0.006	±0.012

2612.8	1.125	1.175	1.120	1.152	1.171	1.091	1.192
	±0.017	±0.009	±0.013	±0.008	±0.008	±0.006	±0.013

2630.7	1.103	1.154	1.100	1.152	1.150	1.074	1.170
	±0.017	±0.008	±0.013	±0.008	±0.008	±0.007	±0.011

2648.5	1.090	1.139	1.087	1.117	1.135	1.063	1.155
	±0.016	±0.008	±0.012	±0.008	±0.007	±0.006	±0.012

2666.3	1.090	1.137	1.087	1.116	1.133	1.064	1.152
	±0.015	±0.008	±0.012	±0.008	±0.008	±0.006	±0.010

2684.0	1.187	1.135	1.084	1.114	1.130	1.061	1.152
	±0.016	±0.009	±0.012	±0.008	±0.008	±0.007	±0.011

2671.8	1.040	1.085	1.037	1.165	1.082	1.014	1.102
	±0.015	±0.010	±0.012	±0.009	±0.009	±0.007	±0.013

2719.6	0.997	1.040	0.994	1.020	1.036	0.969	1.055
	±0.015	±0.010	±0.012	±0.009	±0.010	±0.008	±0.013

2737.3	1.027	1.078	1.024	1.055	1.073	0.995	1.096
	±0.017	±0.011	±0.014	±0.010	±0.011	±0.008	±0.013

2755.1	1.080	1.139	1.077	1.113	1.135	1.043	1.161
	±0.020	±0.012	±0.016	±0.010	±0.010	±0.009	±0.015

2772.8	1.103	1.166	1.100	1.139	1.161	1.062	1.189
	±0.022	±0.011	±0.017	±0.011	±0.011	±0.010	±0.017

2790.5	1.073	1.130	1.069	1.105	1.126	1.037	1.150
	±0.020	±0.012	±0.016	±0.011	±0.011	±0.009	±0.015

2808.2	1.060	1.110	1.057	1.087	1.106	1.032	1.126
	±0.017	±0.011	±0.014	±0.011	±0.011	±0.009	±0.013

2825.9	1.083	1.139	1.080	1.114	1.135	1.050	1.158
	±0.017	±0.012	±0.015	±0.011	±0.011	±0.010	±0.013

2843.6	1.107	1.165	1.104	1.140	1.160	1.074	1.186
	±0.020	±0.013	±0.016	±0.012	±0.011	±0.010	±0.016

2861.3	1.086	1.132	1.083	1.112	1.128	1.059	1.150
	±0.017	±0.012	±0.014	±0.011	±0.011	±0.010	±0.014

2879.0	1.099	1.147	1.096	1.126	1.143	1.069	1.163
	±0.018	±0.013	±0.015	±0.011	±0.012	±0.010	±0.014

2896.7	1.105	1.151	1.102	1.129	1.146	1.078	1.165
	±0.019	±0.016	±0.017	±0.015	±0.015	±0.013	±0.017

2914.3	1.105	1.153	1.102	1.133	1.149	1.078	1.171
	±0.018	±0.013	±0.015	±0.012	±0.012	±0.011	±0.015

Notes. The number of sample for each group is also reported.

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