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4871 Riverside (1989 WH1)
Classification: Main-belt Asteroid          SPK-ID: 2004871
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1077267248236302 3.2795e-08  
a 2.257840730060193 6.2544e-09 au
q 2.014610943037414 7.6139e-08 au
i 2.894000611308806 3.3858e-06 deg
node 263.6355138115862 7.1007e-05 deg
peri 142.4935008526705 7.3014e-05 deg
M 11.52987344702314 1.7125e-05 deg
tp 2458960.811889670001
(2020-Apr-21.31188967)
5.8907e-05 TDB
period 1239.191373994543
3.39
5.149e-06
1.41e-08
d
yr
n .2905120286945973 1.2071e-09 deg/d
Q 2.501070517082972 6.9282e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2392  
   data-arc span      14596 days (39.96 yr)  
   first obs. used      1980-01-22  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45174  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:24:05  

Additional Information
 Earth MOID = 1.02505 au 
 Jupiter MOID = 2.81673 au 
 T_jup = 3.613 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO502200  
diameter diameter 5.082 km 0.402 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.051 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Hills, K. (2017) Minor Planet Bull. 44, 114-115.]
geometric albedo albedo 0.327   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4871 Riverside (1989 WH1)          Discovered 1989-Nov-24 by Koishikawa, M. at Ayashi Station
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 WH1 = 1980 BN3 = 1982 UF = 1987 DU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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