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Thread: Astronomers Have Discovered a 2-km Asteroid Orbiting Closer to the Sun than Venus

  1. #1
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    Jul 2003
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    Astronomers Have Discovered a 2-km Asteroid Orbiting Closer to the Sun than Venus

    Astronomers have painstakingly built models of the asteroid population, and those models predict that there will be ~1 km sized asteroids that orbit closer to the Sun than Venus does. The problem is, nobody’s been able to find one. Until now. Astronomers working with the Zwicky Transient Facility say they’ve finally found one. But this …
    Continue reading "Astronomers Have Discovered a 2-km Asteroid Orbiting Closer to the Sun than Venus"
    The post Astronomers Have Discovered a 2-km Asteroid Orbiting Closer to the Sun than Venus appeared first on Universe Today.


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  2. #2
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    Sep 2004
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    original paper:


    https://arxiv.org/abs/2009.04125

    A kilometer-scale asteroid inside Venus's orbit

    W.-H. Ip, B. T. Bolin, F. J. Masci, Q. Ye, E. A. Kramer, G. Helou, T. Ahumada, M. W. Coughlin, M. J. Graham, R. Walters, K. P. Deshmukh, C. Fremling, Z.-Y. Lin, J. W. Milburn, J. N. Purdum, R. Quimby, D. Bodewits, C.-K. Chang, C.-C. Ngeow, H. Tan, C. Zhai, P. van Dokkum, M. Granvik, Y. Harikane, L. A. Mowla, K. B. Burdge, E. C. Bellm, K. De, S. B. Cenko, C. M. Copperwheat, R. Dekany, D. A. Duev, D. Hale, M. M. Kasliwal, S. R. Kulkarni, T. Kupfer, A. Mahabal, P. J. Mróz, J. D. Neill, R. Riddle, H. Rodriguez, E. Serabyn, R. M. Smith, J. Sollerman, M. T. Soumagnac, J. Southworth, L. Yan

    Near-Earth asteroid population models predict the existence of asteroids located inside the orbit of Venus. However, despite searches up to the end of 2019, none have been found. Here we report the discovery by the Zwicky Transient Facility of the first known asteroid located inside of Venus' orbit, 2020 AV2, possessing an aphelion distance of 0.65 au and ∼2 km in size. While it is possible that 2020 AV2 is the largest of its kind, we find that its discovery is surprising in the context of population models where the expected count is close to zero. If this discovery is not a statistical fluke, then 2020 AV2 may come from a yet undiscovered source population of asteroids interior to Venus, and currently favored asteroid population models may need to be adjusted.
    Do good work. —Virgil Ivan "Gus" Grissom

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