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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2475563891346655 5.0006e-08  
a 2.347370121921094 1.1002e-08 au
q 1.766263650575708 1.2178e-07 au
i 4.698063384737769 5.28e-06 deg
node 348.1740684522378 4.7387e-05 deg
peri 341.4378356292087 4.8297e-05 deg
M 277.2860800561911 7.8417e-06 deg
tp 2459302.319216922748
(2021-Mar-28.81921692)
2.9216e-05 TDB
period 1313.623126143738
3.60
9.2352e-06
2.528e-08
d
yr
n .274051204516179 1.9267e-09 deg/d
Q 2.928476593266479 1.3725e-08 au
  Orbit Determination Parameters
   # obs. used (total)      437  
   data-arc span      7539 days (20.64 yr)  
   first obs. used      1999-09-06  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49181  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:25:27  

Additional Information
 Earth MOID = .756205 au 
 Jupiter MOID = 2.4368 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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