{"id":38515,"date":"2025-05-30T09:29:35","date_gmt":"2025-05-30T07:29:35","guid":{"rendered":"https:\/\/karmaka.de\/?p=38515"},"modified":"2025-05-30T09:29:37","modified_gmt":"2025-05-30T07:29:37","slug":"apache-point-rapid-response-characterization-of-primitive-pre-impact-detection-asteroid-2024-rw1","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=38515","title":{"rendered":"Apache Point rapid response characterization of primitive pre-impact detection asteroid 2024 RW1<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Carl Ingebretsen, Bryce T. Bolin, Robert Jedicke, Peter Vere\u0161, Christine H. Chen, Carey M. Lisse, Russet McMillan, Torrie Sutherland, Amanda J. Townsend<\/p>\n\n\n\n<p>submitted to ApJL<br><a href=\"https:\/\/arxiv.org\/pdf\/2505.23736\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Pre-impact detection asteroids (PIDAs) may be detected only a few hours before their impact with Earth, providing a brief opportunity to characterize them before impact. We describe the characterization of PIDA 2024 RW1, which was discovered by the Catalina Sky Survey on 2024 September 4 at 05:43 UTC, before it entered the atmosphere near the northern Philippines at 16:39 UTC. We observed 2024 RW1 with the Astrophysical Research Consortium Telescope Imaging Camera on the Apache Point Astrophysical Research Consortium&#8217;s 3.5-m telescope on 2024 September 4 10:16 UTC. We obtained g, r, i, and z photometry of 2024 RW1, yielding color indices of g-r = 0.47\u00b10.04, r-i = 0.13\u00b10.04, i-z = -0.11\u00b10.07, and g-i = 0.60\u00b10.04, corresponding to a spectral slope of 0.67\u00b10.40%\/100 nm. The closest match to an asteroid spectral type is with B-type asteroids from the C-complex. We detect variations in the time series photometry of the asteroid with an amplitude of ~0.75, and a double-peaked rotation period of ~1900 s. Assuming a visible albedo of 0.07 and a density of ~1500 kg\/m^3, and using the derived absolute magnitude of 32.2\u00b10.5, we calculate that the asteroid has a diameter of 1.8\u00b10.4 m and a total mass of ~5000 kg. The most likely source of 2024 RW1 is the 3:1 mean motion resonance followed by the \u03bd6 resonance, according to NEOMOD3.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Carl Ingebretsen, Bryce T. Bolin, Robert Jedicke, Peter Vere\u0161, Christine H. Chen, Carey M. Lisse, Russet McMillan, Torrie Sutherland, Amanda J. Townsend submitted to ApJLPDF (OPEN ACCESS) &#8220;Pre-impact detection asteroids (PIDAs) may be detected only&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,5445,2350,96,97],"tags":[6892,1854,1162,5205,141,216],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38515"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=38515"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38515\/revisions"}],"predecessor-version":[{"id":38516,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38515\/revisions\/38516"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=38515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=38515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=38515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}