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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4353210265450322 4.5924e-08  
a 1.919415662794436 1.2281e-09 au
q 1.083853666100149 8.8685e-08 au
i 11.87652626395175 6.0887e-06 deg
node 171.3372521389205 2.7818e-05 deg
peri 26.67479910956908 2.9611e-05 deg
M 250.2803103823346 9.3747e-06 deg
tp 2458896.528856850764
(2020-Feb-17.02885685)
2.5408e-05 TDB
period 971.2968459684446
2.66
9.3222e-07
2.552e-09
d
yr
n .3706384937769021 3.5573e-10 deg/d
Q 2.754977659488723 1.7628e-09 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      32077 days (87.82 yr)  
   first obs. used      1932-03-12  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45852  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-08 06:23:49  

Additional Information
 Earth MOID = .107716 au 
 Jupiter MOID = 2.21482 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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