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52821 (1998 RU4)
Classification: Main-belt Asteroid          SPK-ID: 2052821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3027725542338686 4.9093e-08  
a 2.39864164341068 1.1313e-08 au
q 1.672398786343504 1.1674e-07 au
i 21.75446249797278 7.803e-06 deg
node 359.730473407569 1.6262e-05 deg
peri 95.17588849963376 2.7711e-05 deg
M 247.2138200564705 1.3578e-05 deg
tp 2459425.608577062597
(2021-Jul-30.10857706)
5.0585e-05 TDB
period 1356.895745730189
3.71
9.5997e-06
2.628e-08
d
yr
n .2653114663619734 1.877e-09 deg/d
Q 3.124884500477856 1.4739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      868  
   data-arc span      12669 days (34.69 yr)  
   first obs. used      1983-09-12  
   last obs. used      2018-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4299  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 14:55:54  

Additional Information
 Earth MOID = .836925 au 
 Jupiter MOID = 2.41065 au 
 T_jup = 3.371 
[ 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 15.2   n/a MPO449341  
diameter diameter 1.936 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.471   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

52821 (1998 RU4)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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