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161922 (2007 EA57)
Classification: Outer Main-belt Asteroid          SPK-ID: 2161922
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07665743053918712 3.5305e-08  
a 3.232150531844985 3.2255e-08 au
q 2.984382176957881 1.1128e-07 au
i 15.09224641985939 6.3573e-06 deg
node 52.62205978665128 1.655e-05 deg
peri 74.17733442888877 4.8139e-05 deg
M 145.2761213704527 4.4198e-05 deg
tp 2458143.999676894208
(2018-Jan-25.49967689)
0.00025952 TDB
period 2122.44182601641
5.81
3.1771e-05
8.698e-08
d
yr
n .1696159562948684 2.539e-09 deg/d
Q 3.479918886732089 3.4727e-08 au
  Orbit Determination Parameters
   # obs. used (total)      630  
   data-arc span      8798 days (24.09 yr)  
   first obs. used      1996-05-14  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53818  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 03:11:03  

Additional Information
 Earth MOID = 2.04442 au 
 Jupiter MOID = 1.73758 au 
 T_jup = 3.127 
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Orbital Elements at Epoch 2457480.5 (2016-Apr-02.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07792383676434847 3.5072e-08  
q 2.974943394544706 1.112e-07 au
tp 2458133.403097879205
(2018-Jan-14.90309788)
0.00025475 TDB
node 52.67414512379972 1.6519e-05 deg
peri 71.93150153345424 4.7556e-05 deg
i 15.11958506778702 6.3664e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      630  
   data-arc span      8798 days (24.09 yr)  
   first obs. used      1996-05-14  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53818  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 03:11:03  

Additional Information
 Jupiter MOID = 1.73758 au 
 T_jup = 3.127 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.230032116983987E-15 -3.762351226899882E-15 6.445047598500136E-13 3.576519011533087E-15 9.080183899408733E-14 -2.152506199033324E-15
q -3.762351226899882E-15 1.236651107297599E-14 -1.55769681219634E-12 -1.05714624367144E-14 -2.558623447667625E-13 9.792217397843291E-15
tp 6.445047598500136E-13 -1.55769681219634E-12 6.489985875233275E-8 -4.534977208849662E-12 1.137138901681114E-8 -1.225667880440221E-11
node 3.576519011533087E-15 -1.05714624367144E-14 -4.534977208849662E-12 2.728730763872188E-10 -2.642551953509917E-10 -3.348496605594047E-11
peri 9.080183899408733E-14 -2.558623447667625E-13 1.137138901681114E-8 -2.642551953509917E-10 2.261562206956285E-9 3.013471350909509E-11
i -2.152506199033324E-15 9.792217397843291E-15 -1.225667880440221E-11 -3.348496605594047E-11 3.013471350909509E-11 4.053084947783185E-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 14.7   n/a MPO436815  
diameter diameter 5.757 km 1.503 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.111   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

161922 (2007 EA57)          Discovered 2007-Mar-14 by Lowe, A. at Mayhill
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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