(21361) Carsonmark Main-belt Asteroid
Discovered on 28 April 1997 by Spacewatch at Kitt Peak.
Jordan Carson Mark (1913-1997) worked as a physicist and administrator at Los Alamos National Laboratory and as an advisor on the safety of nuclear reactors. Name suggested and citation prepared by Robert Jedicke and Peter Jedicke.Naming citation (MPC batch dated 2016-08-18), IAU / Minor Planet Center, via NASA/JPL
Where Carsonmark is today
Seen from above the solar system on 2026-10-14: Carsonmark is 2.24 au from the Sun and 1.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21361 |
| Provisional designation | 1997 HQ |
| Orbit class | Main-belt Asteroid |
| Rotation period | 20.2 hours |
| Absolute magnitude (H) | 14.11 |
| Orbital period | 3.87 years |
| Semi-major axis | 2.46 au |
| Perihelion – aphelion | 2.24 – 2.69 au |
| Eccentricity | 0.0922 |
| Inclination | 5.95° |
| 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 Jordan
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