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1221 Amor (1932 EA1)
Classification: Amor [NEO]          SPK-ID: 2001221
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 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4352849382323601 3.633e-08  
a 1.919498150897122 9.788e-10 au
q 1.083969516846739 7.0126e-08 au
i 11.87653930447155 5.0571e-06 deg
node 171.3270055524287 2.5193e-05 deg
peri 26.69479273325496 2.6954e-05 deg
M 38.52240989546067 8.1503e-06 deg
tp 2458896.558035373027
(2020-Feb-17.05803537)
2.1973e-05 TDB
period 971.3594597860157
2.66
7.4298e-07
2.034e-09
d
yr
n .3706146024246325 2.8348e-10 deg/d
Q 2.755026784947505 1.4049e-09 au
  Orbit Determination Parameters
   # obs. used (total)      521  
   data-arc span      32278 days (88.37 yr)  
   first obs. used      1932-03-12  
   last obs. used      2020-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45967  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-29 06:05:36  

Additional Information
 Earth MOID = .107451 au 
 Jupiter MOID = 2.21364 au 
 T_jup = 3.781 
[ 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 17.7   n/a PDS3 (MPC 17261)  
diameter diameter 1.0 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)

1221 Amor (1932 EA1)          Discovered 1932-Mar-12 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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