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5428 (1987 RA1)
Classification: Main-belt Asteroid          SPK-ID: 2005428
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03474634781171467 5.3446e-08  
a 2.905542580067847 2.4595e-08 AU
q 2.804585586999063 1.6068e-07 AU
i .9352567665807385 4.9573e-06 deg
node 269.9239702269346 0.00052359 deg
peri 16.33422046156639 0.00054238 deg
M 231.6694792169034 0.00014356 deg
tp 2457645.361945637232
(2016-Sep-13.86194564)
0.00072215 JED
period 1809.003026036047
4.95
2.2969e-05
6.289e-08
d
yr
n .1990046422359199 2.5268e-09 deg/d
Q 3.006499573136631 2.5449e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1156  
   data-arc span      22064 days (60.41 yr)  
   first obs. used      1954-12-22  
   last obs. used      2015-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50976  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:51:23  

Additional Information
 Earth MOID = 1.7895 AU 
 T_jup = 3.284 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO337299  

5428 (1987 RA1)          Discovered 1987-Sep-13 by Debehogne, H. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 RA1 = 1976 JS4 = 1990 DV2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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