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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082638866790474 5.5898e-08  
a 2.666267971122883 1.7611e-08 au
q 2.110980640528973 1.4515e-07 au
i 3.382824402433742 5.222e-06 deg
node 116.4462693370609 9.9663e-05 deg
peri 213.635072149495 0.0001005 deg
M 83.63046845569785 1.3747e-05 deg
tp 2458831.083619244905
(2019-Dec-13.58361924)
5.8952e-05 TDB
period 1590.208682643982
4.35
1.5755e-05
4.313e-08
d
yr
n .2263853819496452 2.243e-09 deg/d
Q 3.221555301716793 2.1279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      10959 days (30.00 yr)  
   first obs. used      1991-01-12  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5503  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 11:48:34  

Additional Information
 Earth MOID = 1.09905 au 
 Jupiter MOID = 2.13934 au 
 T_jup = 3.349 
[ 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 16.03   n/a E2021B55  
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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