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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03474634716369118 5.3392e-08  
a 2.905542579794834 2.4574e-08 AU
q 2.804585588618396 1.6057e-07 AU
i .9352566472568439 4.9472e-06 deg
node 269.9239636020814 0.00052329 deg
peri 16.33422605679136 0.00054207 deg
M 231.6694803580753 0.0001435 deg
tp 2457645.361939811944
(2016-Sep-13.86193981)
0.00072185 JED
period 1809.003025781078
4.95
2.2949e-05
6.283e-08
d
yr
n .1990046422639684 2.5246e-09 deg/d
Q 3.006499570971272 2.5427e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1160  
   data-arc span      22093 days (60.49 yr)  
   first obs. used      1954-12-22  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51013  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:51:27  

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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