Template:Selected anniversaries/January 4: Difference between revisions

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||2017: Heinz Billing dies ... physicist and computer scientist, widely considered a pioneer in the construction of computer systems and computer data storage, who built a prototype laser interferometric gravitational wave detector. Pic.
||2017: Heinz Billing dies ... physicist and computer scientist, widely considered a pioneer in the construction of computer systems and computer data storage, who built a prototype laser interferometric gravitational wave detector. Pic.


||2020: 2020 AV2 discovered - also known by its internal designation ZTF09k5, is a near-Earth asteroid discovered by the Zwicky Transient Facility on 4 January 2020. It is the first asteroid discovered to have an orbit entirely within Venus's orbit, and is thus the first and only known member of the Vatira population of Atira-class asteroids within the orbit of Venus. 2020 AV2 has the smallest known aphelion and second-smallest known semi-major axis among all asteroids. With an absolute magnitude around 16.4, the asteroid is expected to be larger than 1 km in diameter.
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Revision as of 14:20, 15 January 2020