(18015) Semenkovich Main-belt Asteroid
Discovered on 13 May 1999 by LINEAR at Socorro.
Nicholas Paul Semenkovich (b. 1986) was awarded first place in the 2003 Intel International Science and Engineering Fair for his medicine and health project. He attends the Ladue Horton Watkins High School, Ladue, Missouri, U.S.A.Naming citation (20040614/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Semenkovich is today
Seen from above the solar system on 2026-10-14: Semenkovich is 2.33 au from the Sun and 2.16 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18015 |
| Provisional designation | 1999 JD121 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 23.9 hours |
| Absolute magnitude (H) | 14.76 |
| Orbital period | 3.61 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 2.24 – 2.46 au |
| Eccentricity | 0.0462 |
| Inclination | 6.30° |
| Closest distance between its orbit and Earth's (MOID) | 1.25 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Nicholas
- (2131) Mayall
- (3110) Wagman
- (5774) Ratliff
- (8254) Moskovitz
- (9403) Sanduleak
- (11718) Hayward
- (13699) Nickthomas
- (16150) Clinch
- (16193) Nickaiser
- (19384) Winton
- (19425) Nicholasrapp
- (20371) Ekladyous
All asteroids named after someone called Nicholas
Also discovered on 13 May 1999
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- (11418) Williamwang
- (11743) Jachowski
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- (17147) Mariafields
- (17149) Victoriagraf
- (17151) Zanderhill
- (18012) Marsland
- (18013) Shedletsky
- (18016) Grondahl
- (18019) Dascoli
- (18020) Amend