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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1078686947966741 1.8386e-08  
a 2.258157088094241 5.1954e-09 au
q 2.014572630355657 4.2217e-08 au
i 2.893759680536918 1.0305e-06 deg
node 263.6348152775463 8.7834e-06 deg
peri 142.5064210867071 1.2448e-05 deg
M 69.60466582358126 8.4931e-06 deg
tp 2458960.856582593439
(2020-Apr-21.35658259)
2.9007e-05 TDB
period 1239.45182762639
3.39
4.2775e-06
1.171e-08
d
yr
n .290450981616137 1.0024e-09 deg/d
Q 2.501741545832825 5.7558e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2894  
   data-arc span      15036 days (41.17 yr)  
   first obs. used      1980-01-22  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43281  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:54:49  

Additional Information
 Earth MOID = 1.02409 au 
 Jupiter MOID = 2.81632 au 
 T_jup = 3.612 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.59   n/a MPCxxxxx  
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. 2020-October); 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

Alternate Designations
 1989 WH1 = 1980 BN3 = 1982 UF = 1987 DU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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