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305488 (2008 ER3)
Classification: Main-belt Asteroid          SPK-ID: 2305488
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .26835115264303 4.8225e-08  
a 3.099623598574848 3.396e-08 au
q 2.267836033137751 1.5606e-07 au
i 16.60814438099131 6.4157e-06 deg
node 135.5659157086337 2.0124e-05 deg
peri 312.7461060586023 2.4872e-05 deg
M 142.3698615448801 1.3903e-05 deg
tp 2458212.225592449941
(2018-Apr-03.72559245)
6.9872e-05 TDB
period 1993.250422797973
5.46
3.2758e-05
8.969e-08
d
yr
n .1806095189457727 2.9682e-09 deg/d
Q 3.931411164011945 4.3073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      415  
   data-arc span      6700 days (18.34 yr)  
   first obs. used      2001-12-19  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5726  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 19:59:56  

Additional Information
 Earth MOID = 1.31761 au 
 Jupiter MOID = 1.43386 au 
 T_jup = 3.104 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457242.5 (2015-Aug-08.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .269851474345211 4.8307e-08  
q 2.262270143068728 1.5672e-07 au
tp 2458212.460811647842
(2018-Apr-03.96081165)
6.9383e-05 TDB
node 135.5937776827849 2.013e-05 deg
peri 312.7550416988936 2.4788e-05 deg
i 16.61076452985262 6.4169e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      415  
   data-arc span      6700 days (18.34 yr)  
   first obs. used      2001-12-19  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5726  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 19:59:56  

Additional Information
 Jupiter MOID = 1.43386 au 
 T_jup = 3.104 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.333607722984861E-15 -7.477477614534226E-15 -1.40129283073301E-13 -1.167060975286907E-14 5.305696991435326E-15 -1.064830464759694E-14
q -7.477477614534226E-15 2.456224105741079E-14 1.241280559698222E-12 4.328704943470139E-14 6.115808464394716E-14 3.764508117657047E-14
tp -1.40129283073301E-13 1.241280559698222E-12 4.813979792233388E-9 6.142761745819209E-12 1.0011124087271E-9 9.934120664330436E-12
node -1.167060975286907E-14 4.328704943470139E-14 6.142761745819209E-12 4.052223314933544E-10 -3.872268632803356E-10 9.33762335929143E-12
peri 5.305696991435326E-15 6.115808464394716E-14 1.0011124087271E-9 -3.872268632803356E-10 6.144372154540334E-10 -7.317867872307921E-12
i -1.064830464759694E-14 3.764508117657047E-14 9.934120664330436E-12 9.33762335929143E-12 -7.317867872307921E-12 4.117653408074802E-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 15.3   n/a MPO476360  

305488 (2008 ER3)          Discovered 2008-Mar-01 by LONEOS at Anderson Mesa
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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Alternate Designations
 2008 ER3 = 2005 NS96 = 2006 WV136 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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