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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2537862750912789 5.5069e-08  
a 1.1189483258532 2.1313e-09 au
q .8349745982152941 6.1731e-08 au
i 12.84533325759482 7.1762e-06 deg
node 270.8962612706335 1.9282e-05 deg
peri .01950168671360851 2.7594e-05 deg
M 32.17684118462213 2.6481e-05 deg
tp 2458561.858464173669
(2019-Mar-19.35846417)
3.1781e-05 TDB
period 432.3281088302543
1.18
1.2352e-06
3.382e-09
d
yr
n .8327008876985775 2.3791e-09 deg/d
Q 1.402922053491107 2.6722e-09 au
  Orbit Determination Parameters
   # obs. used (total)      338  
   data-arc span      6936 days (18.99 yr)  
   first obs. used      2001-01-23  
   last obs. used      2020-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63365  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-21 05:26:54  

Additional Information
 Earth MOID = .181509 au 
 Jupiter MOID = 3.6893 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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