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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082281861018859 7.2498e-08  
a 2.665672238398203 1.9774e-08 au
q 2.110604143454391 1.9495e-07 au
i 3.382840310337066 6.1124e-06 deg
node 116.4465054356466 0.00012693 deg
peri 213.5775484647333 0.0001277 deg
M 38.40089357422055 1.3963e-05 deg
tp 2458830.930640388329
(2019-Dec-13.43064039)
6.1108e-05 TDB
period 1589.675754347098
4.35
1.7689e-05
4.843e-08
d
yr
n .2264612761536751 2.5199e-09 deg/d
Q 3.220740333342015 2.3892e-08 au
  Orbit Determination Parameters
   # obs. used (total)      374  
   data-arc span      10900 days (29.84 yr)  
   first obs. used      1991-01-12  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56801  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 23:32:24  

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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