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18393 (1992 QB)
Classification: Main-belt Asteroid          SPK-ID: 2018393
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2261965515606553 3.8271e-08  
a 2.37006018490589 1.1393e-08 au
q 1.833960744088968 8.8021e-08 au
i 24.11339643691981 5.7759e-06 deg
node 55.59957632880912 1.0974e-05 deg
peri 243.571545367907 1.9431e-05 deg
M 225.1766215951601 1.9014e-05 deg
tp 2459499.614507454855
(2021-Oct-12.11450745)
7.2094e-05 TDB
period 1332.715622539967
3.65
9.6101e-06
2.631e-08
d
yr
n .2701251444129476 1.9478e-09 deg/d
Q 2.906159625722811 1.3971e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1233  
   data-arc span      16603 days (45.46 yr)  
   first obs. used      1974-08-22  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:25:01  

Additional Information
 Earth MOID = .919751 au 
 Jupiter MOID = 2.44763 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457029.5 (2015-Jan-07.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268335233921046 3.8287e-08  
q 1.832213371924984 8.8125e-08 au
tp 2456834.189233163983
(2014-Jun-25.68923316)
6.4565e-05 TDB
node 55.64598329392179 1.0982e-05 deg
peri 243.5471046614082 1.9399e-05 deg
i 24.1085147270625 5.7747e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1233  
   data-arc span      16603 days (45.46 yr)  
   first obs. used      1974-08-22  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:25:01  

Additional Information
 Jupiter MOID = 2.44763 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.465900315580338E-15 -3.359335656299289E-15 2.59545437425098E-13 -2.236338764284355E-15 5.773410179297337E-14 6.372844650747384E-15
q -3.359335656299289E-15 7.765994015039917E-15 -4.710136393369262E-13 3.886467759914636E-15 -9.957566716181769E-14 -1.399664668132432E-14
tp 2.59545437425098E-13 -4.710136393369262E-13 4.168640989365648E-9 -1.60928160721006E-11 1.050134592474254E-9 9.192494417556461E-12
node -2.236338764284355E-15 3.886467759914636E-15 -1.60928160721006E-11 1.205954847353525E-10 -1.135252460086095E-10 -1.438758697685874E-11
peri 5.773410179297337E-14 -9.957566716181769E-14 1.050134592474254E-9 -1.135252460086095E-10 3.763359885270814E-10 1.544605580458736E-11
i 6.372844650747384E-15 -1.399664668132432E-14 9.192494417556461E-12 -1.438758697685874E-11 1.544605580458736E-11 3.334686465418364E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO400186  
diameter diameter 3.855 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.248   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18393 (1992 QB)          Discovered 1992-Aug-19 by McNaught, R. H. at Siding Spring
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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