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Debiased albedo distribution for Near Earth Objects

Morbidelli, A. and Delbo, M. and Granvik, M. and Bottke, W. F. and Jedicke, R. and Bolin, B. and Michel, P. and Vokrouhlicky, D. (2020) Debiased albedo distribution for Near Earth Objects. Icarus, 340 . Art. No. 113631. ISSN 0019-1035. doi:10.1016/j.icarus.2020.113631.

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We extend the most recent orbital – absolute magnitude Near Earth Object (NEO) model (Granvik et al., 2018) to provide a statistical description of NEO geometric albedos. Our model is calibrated on NEOWISE albedo data for the NEO population and reproduces these data very well once a simple model for the NEOWISE observational biases is applied. The results are consistent with previous estimates. There are ~1000 NEOs with diameter D > 1 km and the mean albedo to convert absolute magnitude into diameter is 0.147. We don't find any statistically significant evidence that the albedo distribution of NEOs depends on NEO size. Instead, we find evidence that the disruption of NEOs at small perihelion distances found in Granvik et al. (2016) occurs preferentially for dark NEOs. The interval between km-sized bodies striking the Earth should occur on average once every 750,000 years. Low and high albedo NEOs are well mixed in orbital space, but a trend remains with higher albedo objects being at smaller semimajor axes and lower albedo objects more likely found at larger semimajor axes.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Morbidelli, A.0000-0001-8476-7687
Granvik, M.0000-0002-5624-1888
Bolin, B.0000-0002-4950-6323
Additional Information:© 2020 Elsevier Inc. Received 24 May 2019, Revised 15 November 2019, Accepted 7 January 2020, Available online 11 January 2020. We acknowledge support by ESA via contrac AO/1-7015/11/NL/LvH (SGNEOP).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
European Space Agency (ESA)AO/1-7015/11/NL/LvH
Record Number:CaltechAUTHORS:20200121-103941813
Persistent URL:
Official Citation:A. Morbidelli, M. Delbo, M. Granvik, W.F. Bottke, R. Jedicke, B. Bolin, P. Michel, D. Vokrouhlicky, Debiased albedo distribution for Near Earth Objects, Icarus, Volume 340, 2020, 113631, ISSN 0019-1035, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100812
Deposited By: Tony Diaz
Deposited On:21 Jan 2020 18:56
Last Modified:16 Nov 2021 17:57

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