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137120 (1999 BJ8)
Classification: Apollo [NEO, PHA]          SPK-ID: 2137120
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5499626595891598 1.6965e-08  
a 1.899113458910625 1.5103e-09 au
q .854671970186569 3.2001e-08 au
i 8.991308105555479 9.9606e-06 deg
node 339.5934112261683 2.4717e-05 deg
peri 221.855312149082 2.4479e-05 deg
M 105.7554764612715 3.9215e-06 deg
tp 2458919.681859185694
(2020-Mar-11.18185919)
1.0128e-05 TDB
period 955.9271451079122
2.62
1.1403e-06
3.122e-09
d
yr
n .3765977374346457 4.4925e-10 deg/d
Q 2.943554947634681 2.3409e-09 au
  Orbit Determination Parameters
   # obs. used (total)      452  
   data-arc span      7921 days (21.69 yr)  
   first obs. used      1999-01-14  
   last obs. used      2020-09-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46436  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:35:20  

Additional Information
 Earth MOID = .0241143 au 
 Jupiter MOID = 2.0674 au 
 T_jup = 3.737 
[ 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 18.17   n/a E2021B55  

137120 (1999 BJ8)          Discovered 1999-Jan-20 by CSS at Catalina
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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