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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1146146919943685 3.3673e-08  
a 3.160127372656624 2.05e-08 au
q 2.797930347176612 1.1397e-07 au
i 4.208043783951574 4.1397e-06 deg
node 226.9121626612977 5.3744e-05 deg
peri 223.8021395865044 5.7313e-05 deg
M 352.4533890830091 2.1049e-05 deg
tp 2459439.513498489387
(2021-Aug-13.01349849)
0.00012012 TDB
period 2051.895828008819
5.62
1.9966e-05
5.466e-08
d
yr
n .1754475032727894 1.7072e-09 deg/d
Q 3.522324398136636 2.285e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1228  
   data-arc span      8131 days (22.26 yr)  
   first obs. used      1998-12-15  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54445  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:05:16  

Additional Information
 Earth MOID = 1.81643 au 
 Jupiter MOID = 1.68762 au 
 T_jup = 3.191 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457331.5 (2015-Nov-05.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1089937117574087 3.3236e-08  
q 2.818090955626437 1.1188e-07 au
tp 2457377.732286949549
(2015-Dec-21.23228695)
0.00012268 TDB
node 227.0318316662472 5.391e-05 deg
peri 222.5921552315986 5.7935e-05 deg
i 4.195148916532228 4.141e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1228  
   data-arc span      8131 days (22.26 yr)  
   first obs. used      1998-12-15  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54445  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:05:16  

Additional Information
 Jupiter MOID = 1.68762 au 
 T_jup = 3.191 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.104616965141034E-15 -3.67284940615682E-15 -6.172089968109337E-13 4.286023735227133E-16 -7.929177311048954E-14 -1.778421337467458E-16
q -3.67284940615682E-15 1.251622139500371E-14 2.362185510923103E-12 -1.470026675828443E-15 3.153840101664036E-13 1.197597147417438E-15
tp -6.172089968109337E-13 2.362185510923103E-12 1.505142471225704E-8 1.554948733695572E-11 2.622273696304387E-9 1.163715071879955E-12
node 4.286023735227133E-16 -1.470026675828443E-15 1.554948733695572E-11 2.906261362896343E-9 -2.895908455356976E-9 -5.885572049584409E-11
peri -7.929177311048954E-14 3.153840101664036E-13 2.622273696304387E-9 -2.895908455356976E-9 3.356433432387889E-9 5.889207523616371E-11
i -1.778421337467458E-16 1.197597147417438E-15 1.163715071879955E-12 -5.885572049584409E-11 5.889207523616371E-11 1.714763888599612E-11

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 14.04   n/a E2021B10  
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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