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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 104 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2537863413589146 6.0055e-08  
a 1.118948327842005 2.4425e-09 au
q .8349745255493071 6.6951e-08 au
i 12.84533941043072 8.0549e-06 deg
node 270.8962433896264 1.945e-05 deg
peri .01954131494158201 2.9457e-05 deg
M 32.17680142716329 3.1663e-05 deg
tp 2458561.858511815834
(2019-Mar-19.35851182)
3.7974e-05 TDB
period 432.328109982876
1.18
1.4156e-06
3.876e-09
d
yr
n .8327008854785297 2.7265e-09 deg/d
Q 1.402922130134703 3.0624e-09 au
  Orbit Determination Parameters
   # obs. used (total)      334  
   data-arc span      6863 days (18.79 yr)  
   first obs. used      2001-01-23  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63649  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-09 05:22:25  

Additional Information
 Earth MOID = .181509 au 
 Jupiter MOID = 3.6893 au 
 T_jup = 5.525 
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Orbital Elements at Epoch 2456084.5 (2012-Jun-06.0) TDB
Reference: JPL 104 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2537786448937547 6.0133e-08  
q .8350232673282053 6.6932e-08 au
tp 2455967.715050896581
(2012-Feb-10.21505090)
3.5247e-05 TDB
node 270.9339329357465 1.9448e-05 deg
peri 359.9903794535064 2.9397e-05 deg
i 12.84544306221598 8.0557e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      334  
   data-arc span      6863 days (18.79 yr)  
   first obs. used      2001-01-23  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63649  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-09 05:22:25  

Additional Information
 Jupiter MOID = 3.6893 au 
 T_jup = 5.525 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.615975354587181E-15 -4.023317480667965E-15 2.929049708958262E-13 -4.334096968588198E-14 2.483052208322988E-13 6.305435325247772E-14
q -4.023317480667965E-15 4.479888414525119E-15 -3.138346175187758E-13 4.772420695318263E-14 -2.709740065664883E-13 -6.920169084507062E-14
tp 2.929049708958262E-13 -3.138346175187758E-13 1.24236593587701E-9 -6.072771051019413E-11 7.787591309031747E-10 1.035787613891501E-10
node -4.334096968588198E-14 4.772420695318263E-14 -6.072771051019413E-11 3.782088507989214E-10 -4.052342389934864E-10 2.562150071334167E-11
peri 2.483052208322988E-13 -2.709740065664883E-13 7.787591309031747E-10 -4.052342389934864E-10 8.641783582385161E-10 3.274282846638475E-11
i 6.305435325247772E-14 -6.920169084507062E-14 1.035787613891501E-10 2.562150071334167E-11 3.274282846638475E-11 6.489353525907394E-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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