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5487 (1991 UM4)
Classification: Main-belt Asteroid          SPK-ID: 2005487
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1616435747175265 5.3294e-08  
a 2.411268659436292 1.3524e-08 AU
q 2.021502573720672 1.2997e-07 AU
i 2.307640521087664 7.0091e-06 deg
node 355.8746947739621 0.00011858 deg
peri 241.6186231452855 0.00012104 deg
M 211.8828456234705 2.5778e-05 deg
tp 2457563.190636160023
(2016-Jun-23.69063616)
9.9187e-05 JED
period 1367.624363769894
3.74
1.1506e-05
3.15e-08
d
yr
n .2632301745544004 2.2146e-09 deg/d
Q 2.801034745151912 1.571e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1071  
   data-arc span      22421 days (61.39 yr)  
   first obs. used      1953-09-06  
   last obs. used      2015-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57231  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:13:30  

Additional Information
 Earth MOID = 1.01249 AU 
 T_jup = 3.500 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO267730  

5487 (1991 UM4)          Discovered 1991-Oct-18 by Ueda and Kaneda at Kushiro (399)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 UM4 = 1983 RD8 = 1990 LC 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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