(229737) Porthos Main-belt Asteroid
Discovered on 19 April 2007 by B. Christophe at Saint-Sulpice.
Porthos, baron du Vallon de Bracieux de Pierrefonds, is a fictional character in Dumas' novels The Three Musketeers, Twenty Years After and The Vicomte de Bragelonne. He and the other two musketeers Athos and Aramis are friends of the novel's protagonist, d´Artagnan.Naming citation (20100330/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Porthos is today
Seen from above the solar system on 2026-10-14: Porthos is 2.59 au from the Sun and 2.38 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 229737 |
| Provisional designation | 2007 HO4 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.31 |
| Orbital period | 4.56 years |
| Semi-major axis | 2.75 au |
| Perihelion – aphelion | 2.53 – 2.97 au |
| Eccentricity | 0.0801 |
| Inclination | 7.36° |
| Closest distance between its orbit and Earth's (MOID) | 1.52 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.