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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03474635452011881 5.4672e-08  
a 2.905542583458377 2.5288e-08 AU
q 2.80458557078023 1.6306e-07 AU
i .935257584527486 5.2033e-06 deg
node 269.9239846423111 0.00052504 deg
peri 16.33421188771295 0.0005439 deg
M 231.6694721076253 0.00014404 deg
tp 2457645.361982490166
(2016-Sep-13.86198249)
0.0007247 JED
period 1809.003029202484
4.95
2.3616e-05
6.466e-08
d
yr
n .1990046418875868 2.598e-09 deg/d
Q 3.006499596136524 2.6167e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1114  
   data-arc span      22011 days (60.26 yr)  
   first obs. used      1954-12-22  
   last obs. used      2015-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51375  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:21:48  

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 12.6 mag n/a MPO253401  

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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