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JPL Small-Body Database Browser
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39278 (2001 BK9)
Classification: Jupiter Trojan          SPK-ID: 2039278
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0800002040780714 6.6241e-08  
a 5.267802661105788 1.266e-07 au
q 4.846377373174317 4.0075e-07 au
i 6.002352891874672 8.3692e-06 deg
node 27.66794047484204 5.6416e-05 deg
peri 37.73557197849018 7.8295e-05 deg
M 247.4218039224205 5.8045e-05 deg
tp 2459981.502476820378
(2023-Feb-06.00247682)
0.00073821 TDB
period 4416.138372946872
12.09
0.0001592
4.359e-07
d
yr
n .08151918477132622 2.9387e-09 deg/d
Q 5.689227949037258 1.3673e-07 au
  Orbit Determination Parameters
   # obs. used (total)      692  
   data-arc span      10393 days (28.45 yr)  
   first obs. used      1991-04-14  
   last obs. used      2019-09-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55746  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:48:03  

Additional Information
 Earth MOID = 3.86197 au 
 Jupiter MOID = .0199919 au 
 T_jup = 2.983 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.9   n/a MPO337576  
diameter diameter 20.120 km 1.071 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.091   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

39278 (2001 BK9)          Discovered 2001-Jan-19 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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