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161995 (1983 LB)
Classification: Amor [NEO]          SPK-ID: 2161995
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 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4790202243000166 8.497e-08  
a 2.286759077189374 1.2894e-08 au
q 1.191355231114021 1.9808e-07 au
i 25.27209061386398 1.5566e-05 deg
node 81.18816653491167 2.5576e-05 deg
peri 220.6827653690999 4.6422e-05 deg
M 232.95897916305 4.0189e-05 deg
tp 2459446.228617616274
(2021-Aug-19.72861762)
0.00014416 TDB
period 1263.074724090913
3.46
1.0683e-05
2.925e-08
d
yr
n .2850187666126459 2.4107e-09 deg/d
Q 3.382162923264727 1.9071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      12991 days (35.57 yr)  
   first obs. used      1983-06-13  
   last obs. used      2019-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .70671  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jan-26 10:13:01  

Additional Information
 Earth MOID = .245614 au 
 Jupiter MOID = 2.06566 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456973.5 (2014-Nov-12.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4793046559957348 8.4547e-08  
q 1.190455006959915 1.971e-07 au
tp 2456920.478489304984
(2014-Sep-19.97848930)
0.00012649 TDB
node 81.23514779681081 2.5573e-05 deg
peri 220.6827168525482 4.6402e-05 deg
i 25.27754026506393 1.5566e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      12991 days (35.57 yr)  
   first obs. used      1983-06-13  
   last obs. used      2019-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .70671  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jan-26 10:13:01  

Additional Information
 Jupiter MOID = 2.06566 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.148232593910612E-15 -1.665781302683673E-14 -7.836890261706407E-12 4.529891066585488E-13 -2.300409979878071E-12 -4.240826912239926E-13
q -1.665781302683673E-14 3.884949409146379E-14 1.858626491582175E-11 -1.077512870386677E-12 5.470074241301135E-12 1.009809591461578E-12
tp -7.836890261706407E-12 1.858626491582175E-11 1.599891207416194E-8 -9.197023426622389E-10 5.073341809111523E-9 8.952187988588956E-10
node 4.529891066585488E-13 -1.077512870386677E-12 -9.197023426622389E-10 6.539772563814315E-10 -8.313951774435962E-10 -2.648815940178646E-10
peri -2.300409979878071E-12 5.470074241301135E-12 5.073341809111523E-9 -8.313951774435962E-10 2.153120166274436E-9 4.76071290665836E-10
i -4.240826912239926E-13 1.009809591461578E-12 8.952187988588956E-10 -2.648815940178646E-10 4.76071290665836E-10 2.422936023948387E-10

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 17.2   n/a MPO299862  

161995 (1983 LB)          Discovered 1983-Jun-13 by Swann, S. R., Helin, E. F. at Palomar
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

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