434 Hungaria is a bright, E‑type minor planet located in the inner region of the asteroid belt. It is the eponymous member of the Hungaria family, a dynamically distinct group of asteroids characterized by relatively high orbital inclinations and low eccentricities.
Discovery
- Date: 19 September 1898
- Discoverer: French astronomer Auguste Charlois
- Observatory: Nice Observatory, France
- Provisional designation: 1898 DM
The asteroid was named “Hungaria,” the Latin form of “Hungary,” referring to the country and reflecting the contemporary practice of using geographical names for newly discovered bodies.
Orbital characteristics
- Semi‑major axis: ≈ 1.94 AU
- Orbital period: ≈ 2.70 years (≈ 986 days)
- Eccentricity: ≈ 0.07
- Inclination: ≈ 22.5° to the ecliptic
- Mean anomaly (epoch J2000): ~ 123°
These orbital parameters place 434 Hungaria at the inner edge of the main asteroid belt, where it resides in a stable zone separated from the main population by the 1:4 mean‑motion resonance with Mars.
Physical characteristics
- Spectral type: E (high‑albedo, enstatite‑rich)
- Diameter: ~ 11 km (estimates based on infrared observations)
- Geometric albedo: ≈ 0.5–0.6, indicating a highly reflective surface
- Rotation period: Approximately 14 hours (derived from light‑curve analyses)
The high albedo and E‑type spectrum suggest a surface composed predominantly of enstatite and other silicate minerals, similar to that of the most reflective asteroids known.
Significance
434 Hungaria lends its name to the Hungaria asteroid family, which comprises several hundred members sharing similar orbital elements. The family is of interest to planetary scientists because its members occupy a dynamically isolated region, providing insights into collisional evolution and the transport of material in the inner Solar System.
References
Data are compiled from the Minor Planet Center, the Jet Propulsion Laboratory Small‑Body Database, and peer‑reviewed publications on asteroid taxonomy and dynamics.