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79985 (1999 ED4)
Classification: Main-belt Asteroid          SPK-ID: 2079985
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642835963127019 4.4307e-08  
a 2.812904148176151 1.0661e-08 au
q 2.350790138630856 1.2807e-07 au
i 8.724785572059277 5.3753e-06 deg
node 340.5672616553973 1.9062e-05 deg
peri 45.81186830168545 2.4415e-05 deg
M 306.3450332986323 1.3848e-05 deg
tp 2459257.325567266777
(2021-Feb-11.82556727)
6.6557e-05 TDB
period 1723.180721192821
4.72
9.7963e-06
2.682e-08
d
yr
n .2089159863341557 1.1877e-09 deg/d
Q 3.275018157721446 1.2412e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      7904 days (21.64 yr)  
   first obs. used      1999-03-12  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52941  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:21:16  

Additional Information
 Earth MOID = 1.36366 au 
 Jupiter MOID = 2.24678 au 
 T_jup = 3.284 
[ 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 14.3   n/a MPO351406  
diameter diameter 4.447 km 1.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.187   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

79985 (1999 ED4)          Discovered 1999-Mar-12 by Spacewatch at Kitt Peak
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1999 ED4 = 2001 OO68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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