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138947 (2001 BA40)
Classification: Apollo [NEO]          SPK-ID: 2138947
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2537704846943855 5.4465e-08  
a 1.118872589320645 2.047e-09 au
q .8349357500174825 6.1067e-08 au
i 12.84563915347914 6.9319e-06 deg
node 270.8857270139014 1.9013e-05 deg
peri .06136080717817867 2.7205e-05 deg
M 5.22625594428748 2.5975e-05 deg
tp 2458994.224366794660
(2020-May-24.72436679)
3.1187e-05 TDB
period 432.2842160823906
1.18
1.1863e-06
3.248e-09
d
yr
n .8327854374664152 2.2854e-09 deg/d
Q 1.402809428623807 2.5665e-09 au
  Orbit Determination Parameters
   # obs. used (total)      354  
   data-arc span      7212 days (19.75 yr)  
   first obs. used      2001-01-23  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63263  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-23 08:26:19  

Additional Information
 Earth MOID = .18113 au 
 Jupiter MOID = 3.69 au 
 T_jup = 5.525 
[ 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 18.6   n/a MPO445946  
diameter diameter 0.447 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.292   0.282 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

138947 (2001 BA40)          Discovered 2001-Jan-23 by NEAT at Haleakala
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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