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129780 (1999 JJ42)
Classification: Main-belt Asteroid          SPK-ID: 2129780
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2328551031405497 4.0038e-08  
a 2.336452253628035 1.4603e-08 au
q 1.792397423126509 9.3161e-08 au
i 5.154868625730937 4.7318e-06 deg
node 60.6630525702063 5.7598e-05 deg
peri 242.0559727444113 6.0096e-05 deg
M 273.072640826124 2.4071e-05 deg
tp 2459315.483480748398
(2021-Apr-10.98348075)
8.9217e-05 TDB
period 1304.469089445218
3.57
1.2229e-05
3.348e-08
d
yr
n .2759743430586811 2.5872e-09 deg/d
Q 2.88050708412956 1.8003e-08 au
  Orbit Determination Parameters
   # obs. used (total)      436  
   data-arc span      7653 days (20.95 yr)  
   first obs. used      1999-05-10  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59475  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:47:17  

Additional Information
 Earth MOID = .784161 au 
 Jupiter MOID = 2.3728 au 
 T_jup = 3.525 
[ 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 16.5   n/a MPO469354  
diameter diameter 2.986 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129780 (1999 JJ42)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 JJ42 = 2002 EH33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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