New Craters on Mars: An Updated Catalog
We present a catalog of new impacts on Mars. These craters formed in the last few decades, constrained with repeat orbital imaging. Crater diameters range from 58 m down to <1 m. For each impact, we report whether it formed a single crater or a cluster (58% clusters); albedo features of the blast...
| Main Authors: | , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
AMER GEOPHYSICAL UNION
2022
|
| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/DP180100661 http://hdl.handle.net/20.500.11937/90184 |
| _version_ | 1848765347633561600 |
|---|---|
| author | Daubar, I.J. Dundas, C.M. McEwen, A.S. Gao, A. Wexler, D. Piqueux, S. Collins, G.S. Miljković, Katarina Neidhart, Tanja Eschenfelder, J. Bart, G.D. Wagstaff, K.L. Doran, G. Posiolova, L. Malin, M. Speth, G. Susko, D. Werynski, A. |
| author_facet | Daubar, I.J. Dundas, C.M. McEwen, A.S. Gao, A. Wexler, D. Piqueux, S. Collins, G.S. Miljković, Katarina Neidhart, Tanja Eschenfelder, J. Bart, G.D. Wagstaff, K.L. Doran, G. Posiolova, L. Malin, M. Speth, G. Susko, D. Werynski, A. |
| author_sort | Daubar, I.J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present a catalog of new impacts on Mars. These craters formed in the last few decades, constrained with repeat orbital imaging. Crater diameters range from 58 m down to <1 m. For each impact, we report whether it formed a single crater or a cluster (58% clusters); albedo features of the blast zone (88% halos; 64% linear rays; 10% arcuate rays; majority dark-toned; 4% light-toned; 14% dual-toned); and exposures of ice (4% definite; 2% possible). We find no trends in the occurrences of clusters with latitude, elevation, or impact size. Albedo features do not depend on atmospheric fragmentation. Halos are more prevalent at lower elevations, indicating an atmospheric pressure dependence; and around smaller impacts, which could be an observational bias. Linear rays are more likely to form from larger impacts into more consolidated material and may be enhanced by lower atmospheric pressure at higher elevations. Light- and dual-toned blast zones occur in specific regions and more commonly around larger impacts, indicating excavation of compositionally distinct material. Surfaces covered with bright dust lacking cohesion are favored to form detectable surface features. The slope of the cumulative size frequency distribution for this data set is 2.2 for diameters >8 m (differential slope 2.9), significantly shallower than the slope of new lunar craters. We believe that no systematic biases exist in the Martian data set sufficient to explain the discrepancy. This catalog is complete at the time of writing, although observational biases exist, and new discoveries continue. |
| first_indexed | 2025-11-14T11:33:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-90184 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:33:49Z |
| publishDate | 2022 |
| publisher | AMER GEOPHYSICAL UNION |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-901842023-06-07T08:14:34Z New Craters on Mars: An Updated Catalog Daubar, I.J. Dundas, C.M. McEwen, A.S. Gao, A. Wexler, D. Piqueux, S. Collins, G.S. Miljković, Katarina Neidhart, Tanja Eschenfelder, J. Bart, G.D. Wagstaff, K.L. Doran, G. Posiolova, L. Malin, M. Speth, G. Susko, D. Werynski, A. Science & Technology Physical Sciences Geochemistry & Geophysics Mars impact craters METEORITE IMPACTS THERMAL INERTIA SYSTEM FLUX We present a catalog of new impacts on Mars. These craters formed in the last few decades, constrained with repeat orbital imaging. Crater diameters range from 58 m down to <1 m. For each impact, we report whether it formed a single crater or a cluster (58% clusters); albedo features of the blast zone (88% halos; 64% linear rays; 10% arcuate rays; majority dark-toned; 4% light-toned; 14% dual-toned); and exposures of ice (4% definite; 2% possible). We find no trends in the occurrences of clusters with latitude, elevation, or impact size. Albedo features do not depend on atmospheric fragmentation. Halos are more prevalent at lower elevations, indicating an atmospheric pressure dependence; and around smaller impacts, which could be an observational bias. Linear rays are more likely to form from larger impacts into more consolidated material and may be enhanced by lower atmospheric pressure at higher elevations. Light- and dual-toned blast zones occur in specific regions and more commonly around larger impacts, indicating excavation of compositionally distinct material. Surfaces covered with bright dust lacking cohesion are favored to form detectable surface features. The slope of the cumulative size frequency distribution for this data set is 2.2 for diameters >8 m (differential slope 2.9), significantly shallower than the slope of new lunar craters. We believe that no systematic biases exist in the Martian data set sufficient to explain the discrepancy. This catalog is complete at the time of writing, although observational biases exist, and new discoveries continue. 2022 Journal Article http://hdl.handle.net/20.500.11937/90184 10.1029/2021JE007145 English http://purl.org/au-research/grants/arc/DP180100661 http://purl.org/au-research/grants/arc/DE180100584 AMER GEOPHYSICAL UNION restricted |
| spellingShingle | Science & Technology Physical Sciences Geochemistry & Geophysics Mars impact craters METEORITE IMPACTS THERMAL INERTIA SYSTEM FLUX Daubar, I.J. Dundas, C.M. McEwen, A.S. Gao, A. Wexler, D. Piqueux, S. Collins, G.S. Miljković, Katarina Neidhart, Tanja Eschenfelder, J. Bart, G.D. Wagstaff, K.L. Doran, G. Posiolova, L. Malin, M. Speth, G. Susko, D. Werynski, A. New Craters on Mars: An Updated Catalog |
| title | New Craters on Mars: An Updated Catalog |
| title_full | New Craters on Mars: An Updated Catalog |
| title_fullStr | New Craters on Mars: An Updated Catalog |
| title_full_unstemmed | New Craters on Mars: An Updated Catalog |
| title_short | New Craters on Mars: An Updated Catalog |
| title_sort | new craters on mars: an updated catalog |
| topic | Science & Technology Physical Sciences Geochemistry & Geophysics Mars impact craters METEORITE IMPACTS THERMAL INERTIA SYSTEM FLUX |
| url | http://purl.org/au-research/grants/arc/DP180100661 http://purl.org/au-research/grants/arc/DP180100661 http://hdl.handle.net/20.500.11937/90184 |