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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457568.5 (2016-Jun-29.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .167544514596498 4.4528e-08  
q 2.339805060993243 1.2922e-07 au
tp 2457533.711117459873
(2016-May-25.21111746)
6.2443e-05 TDB
node 340.8341273771007 1.907e-05 deg
peri 45.40070899287817 2.4093e-05 deg
i 8.72733796130129 5.3766e-06 deg
  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
 Jupiter MOID = 2.24678 au 
 T_jup = 3.284 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.982701876680527E-15 -5.742448438775991E-15 -1.138870491792514E-12 5.575581517518398E-15 -1.917487835671839E-13 -4.099732383593035E-15
q -5.742448438775991E-15 1.669817453806382E-14 3.248048931876746E-12 -1.645576405433608E-14 5.444830939021477E-13 1.240454843604684E-14
tp -1.138870491792514E-12 3.248048931876746E-12 3.899073660019292E-9 -4.647620232347999E-12 9.171778808642726E-10 3.548645344593503E-12
node 5.575581517518398E-15 -1.645576405433608E-14 -4.647620232347999E-12 3.636651095473196E-10 -3.59823431594657E-10 4.110722492505638E-12
peri -1.917487835671839E-13 5.444830939021477E-13 9.171778808642726E-10 -3.59823431594657E-10 5.804840342527486E-10 -3.493306263348019E-12
i -4.099732383593035E-15 1.240454843604684E-14 3.548645344593503E-12 4.110722492505638E-12 -3.493306263348019E-12 2.890818044369329E-11

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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