(15977) Pyraechmes Jupiter Trojan
Discovered on 19 June 1998 by LINEAR at Socorro.
Pyraechmes was a leader of the Paeonian horsemen from Amydon. He was the first to be killed by Patroclus who fought while wearing Achilles armor.Naming citation (WGSBN Bull. 5, #5, 21), IAU / Minor Planet Center, via NASA/JPL
Where Pyraechmes is today
Seen from above the solar system on 2026-10-14: Pyraechmes is 4.94 au from the Sun and 4.11 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15977 |
| Provisional designation | 1998 MA11 |
| Orbit class | Jupiter Trojan |
| Diameter | 43.5 km (#886 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0710 |
| Rotation period | 250 hours |
| Absolute magnitude (H) | 10.49 |
| Orbital period | 11.7 years |
| Semi-major axis | 5.16 au |
| Perihelion – aphelion | 4.91 – 5.41 au |
| Eccentricity | 0.0485 |
| Inclination | 17.4° |
| Closest distance between its orbit and Earth's (MOID) | 3.95 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 19 June 1998
- (12868) Onken
- (14566) Hokule`a
- (14567) Nicovincenti
- (20392) Mikeshepard
- (20393) Kevinlane
- (21522) Entwisle
- (24988) Alainmilsztajn
- (44194) Urmuz
- (44195) Michaelcordova