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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08079858753362931 6.6301e-08  
a 5.264420725490538 1.2565e-07 au
q 4.839062966688139 4.0213e-07 au
i 6.003602118785047 8.3718e-06 deg
node 27.63921300988935 5.6414e-05 deg
peri 38.1594178042071 7.7884e-05 deg
M 279.7281891845948 5.8111e-05 deg
tp 2459984.250285907503
(2023-Feb-08.75028591)
0.0007314 TDB
period 4411.886306403532
12.08
0.00015796
4.325e-07
d
yr
n .08159775093875066 2.9214e-09 deg/d
Q 5.689778484292938 1.3581e-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 = 3.85508 au 
 Jupiter MOID = .0174027 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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