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39840 (1998 BJ24)
Classification: Main-belt Asteroid          SPK-ID: 2039840
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1056804743419108 4.0278e-08  
a 2.346643159795678 9.846e-09 au
q 2.098648797557271 9.5493e-08 au
i 2.825273084876371 4.5772e-06 deg
node 124.5093117080627 8.3188e-05 deg
peri 346.5059659291051 8.6593e-05 deg
M 344.8230621059996 2.2457e-05 deg
tp 2458655.854210898747
(2019-Jun-21.35421090)
8.1931e-05 TDB
period 1313.012945215145
3.59
8.2636e-06
2.262e-08
d
yr
n .2741785610811415 1.7256e-09 deg/d
Q 2.594637522034086 1.0886e-08 au
  Orbit Determination Parameters
   # obs. used (total)      689  
   data-arc span      9178 days (25.13 yr)  
   first obs. used      1993-11-21  
   last obs. used      2019-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60094  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:08:36  

Additional Information
 Earth MOID = 1.11564 au 
 Jupiter MOID = 2.48685 au 
 T_jup = 3.551 
[ 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 16.2   n/a MPO452721  
diameter diameter 3.812 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39840 (1998 BJ24)          Discovered 1998-Jan-26 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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