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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .253770478947494 5.4678e-08  
a 1.118872589521462 2.0719e-09 au
q .8349357565973782 6.1324e-08 au
i 12.84564062628803 7.0704e-06 deg
node 270.8857301774712 1.9277e-05 deg
peri .06135780398646948 2.7431e-05 deg
M 5.226254612481434 2.6112e-05 deg
tp 2458994.224368392190
(2020-May-24.72436839)
3.1352e-05 TDB
period 432.2842161987716
1.18
1.2008e-06
3.288e-09
d
yr
n .83278543724221 2.3133e-09 deg/d
Q 1.402809422445547 2.5977e-09 au
  Orbit Determination Parameters
   # obs. used (total)      346  
   data-arc span      6945 days (19.01 yr)  
   first obs. used      2001-01-23  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63769  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Mar-17 01:11:33  

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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