1566 Icarus, or 1949 MA, is an extremely eccentric asteroid, approximately 1.4 kilometers in diameter. It is a near-Earth object of the Apollo group and the lowest numbered potentially hazardous object. In 1968, it became the first asteroid ever observed by radar. Its orbit brings it closer to the Sun than Mercury and further out than the orbit of Mars, which also makes it a Mercury-, Venus-, and Mars-crosser. This stony asteroid and relatively fast rotator was discovered by German astronomer Walter Baade at the Palomar Observatory, California, on 27 June 1949.
- ↑ "List Of The Potentially Hazardous Asteroids (PHAs)". Minor Planet Center. 20 September 2017. http://www.minorplanetcenter.net/iau/lists/PHAs.html. Retrieved 21 September 2017.
- ↑ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1566) Icarus. Springer Berlin Heidelberg. p. 124. ISBN 978-3-540-00238-3. https://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_1567. Retrieved 21 September 2017.
- ↑ "1566 Icarus (1949 MA)". Minor Planet Center. http://www.minorplanetcenter.net/db_search/show_object?object_id=1566. Retrieved 21 September 2017.