3430 Bradfield

Bradfield

Discovery
Discovered by	Carolyn S. Shoemaker
Discovery site	Palomar
Discovery date	9 October 1980
Designations
MPC designation	3430
Named after	William A. Bradfield
Alternative names	1980 TF4
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	15054 days (41.22 yr)
Aphelion	3.0270506 AU (452.84032 Gm)
Perihelion	2.4895218 AU (372.42716 Gm)
Semi-major axis	2.758286 AU (412.6337 Gm)
Eccentricity	0.0974389
Orbital period	4.58 yr (1673.2 d)
Mean anomaly	289.9693°
Mean motion	0° 12^m 54.546^s / day
Inclination	4.428355°
Longitude of ascending node	43.22891°
Argument of perihelion	278.68740°
Earth MOID	1.47993 AU (221.394 Gm)
Jupiter MOID	2.23241 AU (333.964 Gm)
Jupiter Tisserand parameter	3.331
Physical characteristics
Absolute magnitude (H)	12.4

3430 Bradfield (1980 TF4) is a main-belt asteroid discovered on October 9, 1980 by Carolyn S. Shoemaker at Palomar.

Named in honor of William A. Bradfield, rocket engineer of Dernancourt, South Australia. Discoverer of eighteen comets, Bradfield was chiefly responsible for the greatly increased rate of discovery of bright comets from the southern hemisphere during the 1970s and 1980s.

With an absolute magnitude of 12.4, asteroid Bradfield is assumed to be 9–20 km in diameter.^[2]

References

1. "3430 Bradfield (1980 TF4)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 14 April 2016.
2. "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-06-16.

External links

• JPL Small-Body Database Browser on 3430 Bradfield
• 3430 Bradfield at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters