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74539 (1999 JD15)
Classification: Mars-crossing Asteroid          SPK-ID: 2074539
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2923934840329864 3.2671e-08  
a 2.352044942149913 1.3159e-08 au
q 1.664322326912536 7.8599e-08 au
i 22.60602573841507 5.955e-06 deg
node 86.27682074299128 1.1608e-05 deg
peri 247.163613856689 1.6767e-05 deg
M 239.6259762323673 1.4358e-05 deg
tp 2459441.051950012132
(2021-Aug-14.55195001)
5.4502e-05 TDB
period 1317.549227319367
3.61
1.1057e-05
3.027e-08
d
yr
n .2732345725953948 2.293e-09 deg/d
Q 3.039767557387291 1.7006e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1047  
   data-arc span      16753 days (45.87 yr)  
   first obs. used      1974-06-17  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:06:27  

Additional Information
 Earth MOID = .76549 au 
 Jupiter MOID = 2.54267 au 
 T_jup = 3.399 
[ 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 14.9   n/a MPO417340  
diameter diameter 2.175 km 0.451 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.409   0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

74539 (1999 JD15)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20040415/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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