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183071 (2002 RO21)
Classification: Main-belt Asteroid          SPK-ID: 2183071
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082281834629583 7.5201e-08  
a 2.665672238904598 2.0144e-08 au
q 2.110604150889857 2.0292e-07 au
i 3.382840637779136 6.204e-06 deg
node 116.4465125557966 0.00012908 deg
peri 213.5775408697419 0.00012987 deg
M 38.40089376635708 1.4041e-05 deg
tp 2458830.930639491579
(2019-Dec-13.43063949)
6.1498e-05 TDB
period 1589.675754800082
4.35
1.8019e-05
4.933e-08
d
yr
n .2264612760891442 2.5669e-09 deg/d
Q 3.220740326919339 2.4338e-08 au
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      10877 days (29.78 yr)  
   first obs. used      1991-01-12  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57516  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 08:39:10  

Additional Information
 Earth MOID = 1.10059 au 
 Jupiter MOID = 2.13977 au 
 T_jup = 3.350 
[ 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 16.1   n/a MPO436904  
diameter diameter 4.015 km 0.691 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.039   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

183071 (2002 RO21)          Discovered 2002-Sep-04 by LONEOS at Anderson Mesa
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 2002 RO21 = 1993 NW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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