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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1617747998811536 5.6659e-08  
a 2.410969768254815 1.2564e-08 AU
q 2.020935616475881 1.3746e-07 AU
i 2.307694776339745 7.7717e-06 deg
node 355.8783306511997 0.00012826 deg
peri 241.6573826035562 0.000131 deg
M 159.1755605066006 2.789e-05 deg
tp 2456195.911390247630
(2012-Sep-25.41139025)
0.00010506 JED
period 1367.370083812757
3.74
1.0688e-05
2.926e-08
d
yr
n .2632791255723401 2.058e-09 deg/d
Q 2.801003920033748 1.4596e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1054  
   data-arc span      22052 days (60.38 yr)  
   first obs. used      1953-09-06  
   last obs. used      2014-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5874  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 18:02:29  

Additional Information
 Earth MOID = 1.01042 AU 
 T_jup = 3.501 
[ 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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