Phase reddening on asteroid Bennu from visible and near-infrared spectroscopy

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Volume 644 (December 2020)

A&A, 644 (2020) A142

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Table 4

Coordinates and phase reddening parameters for the ROIs.

ROI	lat	lon	γ_0.55−2.5	errγ_0.55−2.5	Y_0.55−2.5	errY_0.55−2.5	γ_0.7−1.06	errγ_0.7−1.06	Y_0.7−1.06	errY_0.7−1.06
	(°)	(°)	(μm⁻¹ deg⁻¹)	(μm⁻¹ deg⁻¹)	(μm⁻¹)	(μm⁻¹)	(μm⁻¹ deg⁻¹)	(μm⁻¹ deg⁻¹)	(μm⁻¹)	(μm⁻¹)
Craters

Kingfisher	11.0	56.0	0.000305	0.000627	-0.008182	0.026259	0.000619	0.000940	−0.073181	0.039380
Nightingale	55.4	42.3	0.001294	0.000081	−0.011650	0.004600	0.0025063	0.000155	−0.1095088	0.008857
Osprey	11.0	88.0	0.001296	0.000199	−0.014582	0.006229	0.000795	0.000177	−0.038713	0.005520
Sandpiper	−47.0	322.0	0.000834	0.000055	−0.044621	0.001693	0.000958	0.000069	−0.121959	0.002122
C1	−3.5	125.9	−0.000181	0.000058	0.005083	0.000986	0.000478	0.000066	−0.073673	0.001115
C4	12.9	111.3	0.000524	0.000074	−0.053761	0.004003	0.000875	0.000070	−0.111653	0.003767
C5	27.8	63.7	−0.000125	0.000025	−0.013623	0.000357	0.000346	0.000035	−0.098250	0.000503
C6	−7.7	269.2	0.000294	0.000069	−0.009551	0.002530	0.000703	0.000105	−0.077026	0.003838
C7	−43.3	325.2	0.001044	0.000045	−0.055259	0.001200	0.001355	0.000061	−0.140529	0.001652
C8	−1.2	152.6	0.000081	0.000055	−0.034219	0.002028	0.000334	0.000077	−0.106002	0.002832
C9	0.6	114.1	0.000152	0.000054	−0.035312	0.001614	0.000494	0.000080	−0.108977	0.002400
C11	0.4	302.2	0.000127	0.000089	−0.028022	0.002868	0.000307	0.000148	−0.098102	0.004438
C13	53.3	68.1	0.000536	0.000093	−0.023211	0.004573	0.000924	0.000179	−0.087708	0.008903
C14	9.0	61.3	0.000218	0.000308	−0.024471	0.014922	0.000648	0.000472	−0.096850	0.022877
C15	22.3	48.9	0.001744	0.000281	−0.060904	0.010172	0.002159	0.000373	−0.134144	0.013499
C16	25.7	50.8	0.000674	0.000228	−0.028244	0.008956	0.001534	0.000366	−0.096334	0.014342
C19	26.8	333.3	0.001694	0.000263	−0.026389	0.016965	0.002089	0.000830	−0.093405	0.052524
C20	32.0	229.8	0.000639	0.000110	−0.041959	0.003579	0.000678	0.000218	−0.112865	0.005099
C21	35.1	248.0	0.000539	0.000237	0.000182	0.009095	0.000806	0.000348	−0.062200	0.013362
C22	−24.8	136.9	0.000250	0.000183	−0.020510	0.004045	0.000750	0.000165	−0.099391	0.003637
C36	14.1	328.0	0.000905	0.000188	−0.059970	0.011888	0.001028	0.000373	−0.128348	0.023570
C46	−4.0	125.0	0.000018	0.000053	−0.002986	0.001274	0.000381	0.000074	−0.077828	0.001777
C47	−16.6	84.5	0.000109	0.000058	−0.035202	0.000547	0.000213	0.000095	−0.110507	0.000839
C48	1.000	152.0	0.000107	0.000053	−0.029401	0.002030	0.000428	0.000077	−0.101266	0.002954
C49	−53.8	65.0	0.000244	0.000071	−0.033335	0.000972	0.000396	0.000101	−0.113471	0.001387

Boulders

Benben	−47.0	127.0	0.000094	0.000024	−0.069525	0.000593	0.000384	0.000048	−0.143367	0.001111
Boobrie	49.0	216.0	0.000619	0.000090	−0.033773	0.003725	0.001200	0.000154	−0.112273	0.006727
Camulatz	−10.0	260.0	0.0013576	0.000329	−0.003922	0.001095	0.001257	0.000507	−0.009482	0.001690
Dodo	−34.0	64.0	0.000304	0.000112	−0.043333	0.003047	0.000234	0.000144	−0.106646	0.003734
Gargoyle	5.0	93.0	0.000890	0.000217	−0.022002	0.008749	0.000202	0.000384	−0.076662	0.015453
Gullinkambi	19.0	19.0	0.000247	0.000047	−0.043963	0.002107	0.000565	0.000095	−0.117118	0.004392
Huginn	−30.0	43.0	0.000975	0.000060	−0.031095	0.001752	0.001249	0.000084	−0.102925	0.002416
Kongamato	5.0	67.0	0.001555	0.000255	−0.024983	0.010042	0.002241	0.000323	−0.085915	0.012790
Roc	−24.0	28.0	0.000921	0.000064	−0.023989	0.001511	0.000493	0.000076	−0.063526	0.001759
Tlanuwa	−40.0	270.0	0.000686	0.000094	−0.058495	0.001208	0.000339	0.000137	−0.107947	0.001776
B1	25.0	355.0	0.000213	0.000029	−0.042190	0.001202	0.000653	0.000048	−0.128416	0.001827
B2	−18.0	256.0	0.000461	0.000066	−0.038616	0.000989	0.000600	0.000114	−0.089592	0.001787
B3	−39.0	263.0	0.000175	0.000095	−0.060375	0.001704	−0.000155	0.000122	−0.117750	0.002275
B4	−16.0	300.0	0.000076	0.000072	−0.015343	0.001012	−0.000033	0.000127	−0.066231	0.001773
B5	14.5	262.0	0.000610	0.000133	−0.027675	0.004611	0.000468	0.000191	−0.085158	0.006657

Notes. The quantity γ is the spectral reddening coefficient, and Y the intercept at zero phase angle of the linear fit of the spectral slope vs. the phase angle. For craters (other than the four candidate sampling sites), the same ID numbers used by Deshapriya et al. (2020) are adopted, except for craters C46 to C49, which were not included in that 45-crater study and are arbitrarily numbered. For boulders, an arbitrary label (B1 to B5) is adopted, except for those that already have an official designation approved by the International Astronomical Union.

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