4085 Weir

Weir

Discovery
Discovered by	C. S. Shoemaker
Discovery site	Palomar Observatory
Discovery date	13 May 1985
Designations
MPC designation	4085
Alternative names	1985 JR
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	12502 days (34.23 yr)
Aphelion	2.8839 AU (431.43 Gm)
Perihelion	2.3299 AU (348.55 Gm)
Semi-major axis	2.6069 AU (389.99 Gm)
Eccentricity	0.10627
Orbital period	4.21 yr (1537.4 d)
Mean anomaly	121.386°
Mean motion	0° 14^m 2.976^s / day
Inclination	14.218°
Longitude of ascending node	68.691°
Argument of perihelion	136.101°
Earth MOID	1.34168 AU (200.712 Gm)
Jupiter MOID	2.13757 AU (319.776 Gm)
Jupiter Tisserand parameter	3.360
Physical characteristics
Rotation period	14.602 h (0.6084 d)
Absolute magnitude (H)	12.1

4085 Weir (1985 JR) is a main-belt asteroid discovered on May 13, 1985 by C. S. Shoemaker at Palomar Observatory.

Photometric observations of this asteroid collected during 2006 show a rotation period of 14.602 ± 0.005 hours with a brightness variation of 0.18 ± 0.02 magnitude.^[2]

References

1. "4085 Weir (1985 JR)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 14 April 2016.
2. Warner, Brian D. (December 2006), "Asteroid lightcurve analysis at the Palmer Divide Observatory - March - June 2006", The Minor Planet Bulletin 33 (4): 85–88, Bibcode:2006MPBu...33...85W.

External links

• JPL Small-Body Database Browser on 4085 Weir
• 4085 Weir at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters