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21259 (1996 ED4)
Classification: Main-belt Asteroid          SPK-ID: 2021259
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06542049328220671 4.7148e-08  
a 3.03373973677973 1.62e-08 au
q 2.835270986709768 1.4004e-07 au
i 10.08932624563051 5.3498e-06 deg
node 358.9238755178604 1.9006e-05 deg
peri 322.2155068880035 3.6687e-05 deg
M 102.5516150480836 3.0955e-05 deg
tp 2458650.698512406518
(2019-Jun-16.19851241)
0.00016608 TDB
period 1930.038209937994
5.28
1.5459e-05
4.232e-08
d
yr
n .1865248046107676 1.494e-09 deg/d
Q 3.232208486849692 1.7259e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1800  
   data-arc span      10873 days (29.77 yr)  
   first obs. used      1991-04-13  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50675  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:39  

Additional Information
 Earth MOID = 1.82956 au 
 Jupiter MOID = 2.05703 au 
 T_jup = 3.215 
[ 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 13.52   n/a E2021B10  
diameter diameter 7.221 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.178   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21259 (1996 ED4)          Discovered 1996-Mar-11 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 ED4 = 1998 QX61 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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