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129796 (1999 JE121)
Classification: Main-belt Asteroid          SPK-ID: 2129796
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2591953328172732 3.2088e-08  
a 2.318195396748108 7.7502e-09 au
q 1.717329969352512 7.502e-08 au
i 4.668908804841111 5.6489e-06 deg
node 164.1763793280064 4.7968e-05 deg
peri 139.2361073282844 4.9299e-05 deg
M 307.9599221991566 1.1249e-05 deg
tp 2459186.862669152671
(2020-Dec-03.36266915)
4.0513e-05 TDB
period 1289.209465668291
3.53
6.4652e-06
1.77e-08
d
yr
n .2792408910939742 1.4003e-09 deg/d
Q 2.919060824143704 9.7591e-09 au
  Orbit Determination Parameters
   # obs. used (total)      600  
   data-arc span      7656 days (20.96 yr)  
   first obs. used      1999-05-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54123  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:47:17  

Additional Information
 Earth MOID = .705604 au 
 Jupiter MOID = 2.34758 au 
 T_jup = 3.530 
[ 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 16.5   n/a MPO436629  
diameter diameter 1.187 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.378   0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129796 (1999 JE121)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

Alternate Designations
 1999 JE121 = 2002 CY153 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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