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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4353210361906171 4.5404e-08  
a 1.919415662442026 1.1853e-09 au
q 1.083853647387264 8.7667e-08 au
i 11.8765262305727 6.0866e-06 deg
node 171.3372505039086 2.697e-05 deg
peri 26.67479564809276 2.8444e-05 deg
M 250.2803172608734 8.2637e-06 deg
tp 2458896.528838210617
(2020-Feb-17.02883821)		 2.2389e-05 TDB
period 971.2968457009456
2.66		 8.9972e-07
2.463e-09		 d
yr
n .3706384938789774 3.4333e-10 deg/d
Q 2.75497767749679 1.7013e-09 au
   Orbit Determination Parameters
   # obs. used (total)      476  
   data-arc span      32094 days (87.87 yr)  
   first obs. used      1932-03-12  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46019  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-25 05:45:31  

Additional Information
 Earth MOID = .107716 au 
 Jupiter MOID = 2.21482 au 
 T_jup = 3.781 
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[ 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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