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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 107 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2537704843313705 5.4722e-08  
a 1.118872589762343 2.0747e-09 au
q .8349357507532587 6.137e-08 au
i 12.84564125047309 7.0827e-06 deg
node 270.8857298667072 1.9278e-05 deg
peri .06136035587643574 2.745e-05 deg
M 5.226250195984984 2.6175e-05 deg
tp 2458994.224373693445
(2020-May-24.72437369)
3.1427e-05 TDB
period 432.2842163383706
1.18
1.2024e-06
3.292e-09
d
yr
n .8327854369732757 2.3164e-09 deg/d
Q 1.402809428771428 2.6012e-09 au
  Orbit Determination Parameters
   # obs. used (total)      345  
   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      .63157  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 14:29:08  

Additional Information
 Earth MOID = .18113 au 
 Jupiter MOID = 3.69 au 
 T_jup = 5.525 
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Orbital Elements at Epoch 2456394.5 (2013-Apr-12.0) TDB
Reference: JPL 107 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .253872095275107 5.481e-08  
q .8349049210752223 6.1393e-08 au
tp 2456400.093194788251
(2013-Apr-17.59319479)
3.0755e-05 TDB
node 270.9323802395558 1.927e-05 deg
peri .005378904517654031 2.7389e-05 deg
i 12.84648235634434 7.0833e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      345  
   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      .63157  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 14:29:08  

Additional Information
 Jupiter MOID = 3.69 au 
 T_jup = 5.525 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.004145943023075E-15 -3.36386796449526E-15 -1.2884471578781E-13 -1.204097757769259E-14 -3.065628676148121E-15 9.925931715028312E-15
q -3.36386796449526E-15 3.769157914888283E-15 1.432815085053028E-13 1.38761463944942E-14 3.438850011834977E-16 -1.172014405293898E-14
tp -1.2884471578781E-13 1.432815085053028E-13 9.45865495119441E-10 -3.474791420982444E-11 5.969302374630322E-10 6.086142208195804E-11
node -1.204097757769259E-14 1.38761463944942E-14 -3.474791420982444E-11 3.713291522230884E-10 -3.850654358591284E-10 3.55347864632641E-11
peri -3.065628676148121E-15 3.438850011834977E-16 5.969302374630322E-10 -3.850654358591284E-10 7.501686121532733E-10 9.451159721646141E-13
i 9.925931715028312E-15 -1.172014405293898E-14 6.086142208195804E-11 3.55347864632641E-11 9.451159721646141E-13 5.01737976746123E-11

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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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