(175204) Gregbyrne Main-belt Asteroid
Discovered on 31 March 2005 by V. Reddy at Goodricke-Pigott.
Greg Byrne (b. 1955) is a space physicist. He began his NASA career training astronauts for Space Shuttle flights, served as the chief of Astromaterials Research & Exploration Science at Johnson Space Center; and the NASA chair professor of space systems at the Naval Postgraduate School.Naming citation (MPC batch dated 2020-08-07), IAU / Minor Planet Center, via NASA/JPL
Where Gregbyrne is today
Seen from above the solar system on 2026-10-14: Gregbyrne is 3.03 au from the Sun and 2.84 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 175204 |
| Provisional designation | 2005 FT5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.58 km (#16,110 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.201 |
| Absolute magnitude (H) | 15.58 |
| Orbital period | 4.61 years |
| Semi-major axis | 2.77 au |
| Perihelion – aphelion | 2.48 – 3.06 au |
| Eccentricity | 0.104 |
| Inclination | 10.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.49 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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