(9349) Lucas Main-belt Asteroid
Discovered on 30 September 1991 by R. H. McNaught at Siding Spring.
Named in memory of François Edouard Anatole Lucas (1842-1891), French number theorist, best known for his test for Mersenne primes and the demonstration that 2127-1 is prime. His interests included magic squares and Fibonacci numbers, and while studying the latter he devised the similar sequence 2, 1, 3, 4, 7, ..., now known as Lucas numbers. The number of this minor planet is the twentieth member of this sequence. Name proposed by the discoverer following a suggestion by B. G. Marsden.Naming citation (19981208/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Lucas as a baby name🐶 Lucas as a dog name🐱 Lucas as a cat name
Where Lucas is today
Seen from above the solar system on 2026-10-14: Lucas is 1.94 au from the Sun and 0.962 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9349 |
| Provisional designation | 1991 SX |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.7 |
| Orbital period | 3.49 years |
| Semi-major axis | 2.30 au |
| Perihelion – aphelion | 1.86 – 2.74 au |
| Eccentricity | 0.191 |
| Inclination | 6.69° |
| Closest distance between its orbit and Earth's (MOID) | 0.854 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Francois
- (7865) Francoisgros
- (9553) Colas
- (9588) Quesnay
- (10140) Villon
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- (13560) La Perouse
- (14189) Sevre
- (19250) Poullain
- (24103) Dethury
- (31043) Sturm
- (31823) Viete
All asteroids named after someone called Francois
Also discovered on 30 September 1991
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- (14424) Laval
- (14888) Kanazawashi
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- (20015) Liguori
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