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173248 (1999 RA54)
Classification: Main-belt Asteroid          SPK-ID: 2173248
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2472790279242223 5.7499e-08  
a 2.347676188293204 1.1184e-08 au
q 1.767145102571217 1.3819e-07 au
i 4.697329204895698 5.9149e-06 deg
node 348.1746047809958 5.1906e-05 deg
peri 341.4431717973911 5.2999e-05 deg
M 167.6475229337321 8.2534e-06 deg
tp 2457988.642398913934
(2017-Aug-23.14239891)
3.0088e-05 TDB
period 1313.880053438378
3.60
9.3889e-06
2.571e-08
d
yr
n .2739976142098304 1.958e-09 deg/d
Q 2.928207274015191 1.395e-08 au
  Orbit Determination Parameters
   # obs. used (total)      407  
   data-arc span      7095 days (19.43 yr)  
   first obs. used      1999-09-06  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50035  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 12:28:40  

Additional Information
 Earth MOID = .756185 au 
 Jupiter MOID = 2.43385 au 
 T_jup = 3.514 
[ 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 16.7   n/a MPO264383  
diameter diameter 2.909 km 0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.063   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173248 (1999 RA54)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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