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78142 (2002 NR18)
Classification: Main-belt Asteroid          SPK-ID: 2078142
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1142500119151959 3.3738e-08  
a 3.158933209066277 2.093e-08 au
q 2.798025052291147 1.1397e-07 au
i 4.208752078050558 4.1431e-06 deg
node 226.912200741737 5.4959e-05 deg
peri 223.8684064835902 5.8527e-05 deg
M 282.8697561047348 2.1222e-05 deg
tp 2459439.870906318257
(2021-Aug-13.37090632)
0.00012249 TDB
period 2050.732868021985
5.61
2.0381e-05
5.58e-08
d
yr
n .1755469986430923 1.7447e-09 deg/d
Q 3.519841365841406 2.3322e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      8007 days (21.92 yr)  
   first obs. used      1998-12-15  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54893  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:07  

Additional Information
 Earth MOID = 1.81649 au 
 Jupiter MOID = 1.6894 au 
 T_jup = 3.191 
[ 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 14.0   n/a MPO449492  
diameter diameter 8.165 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78142 (2002 NR18)          Discovered 2002-Jul-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2002 NR18 = 1998 XL82 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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