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226820 (2004 RR254)
Classification: Main-belt Asteroid          SPK-ID: 2226820
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204230433766007 6.6246e-08  
a 2.74166687989806 1.8603e-08 au
q 2.1373403223061 1.7536e-07 au
i 8.091395761428998 5.6879e-06 deg
node 51.71303758796268 3.8061e-05 deg
peri 311.813250116329 3.9878e-05 deg
M 158.5523290692559 1.3261e-05 deg
tp 2458270.218026293379
(2018-May-31.71802629)
5.7282e-05 TDB
period 1658.137171984068
4.54
1.6876e-05
4.62e-08
d
yr
n .2171111088289739 2.2097e-09 deg/d
Q 3.345993437490019 2.2703e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      7054 days (19.31 yr)  
   first obs. used      2000-11-30  
   last obs. used      2020-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49595  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 02:30:41  

Additional Information
 Earth MOID = 1.14588 au 
 Jupiter MOID = 2.14229 au 
 T_jup = 3.300 
[ 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 15.7   n/a MPO470426  
diameter diameter 4.326 km 0.331 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.065   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

226820 (2004 RR254)          Discovered 2004-Sep-06 by NEAT at Palomar
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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