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153958 (2002 AM31)
Classification: Apollo [NEO, PHA]          SPK-ID: 2153958
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4514704468196492 9.4282e-09  
a 1.703096362390633 6.5491e-09 au
q .9341986866852148 1.5137e-08 au
i 4.644613236517891 2.1661e-06 deg
node 144.3785563891962 1.3192e-05 deg
peri 197.9279357107851 1.0372e-05 deg
M 177.3937788917572 7.3862e-06 deg
tp 2458600.469464647894
(2019-Apr-26.96946465)
1.4378e-05 TDB
period 811.8153501574105
2.22
4.6827e-06
1.282e-08
d
yr
n .4434505949292487 2.5579e-09 deg/d
Q 2.471994038096051 9.5059e-09 au
  Orbit Determination Parameters
   # obs. used (total)      674  
   # delay obs. used      7  
   # Doppler obs. used      1  
   data-arc span      13432 days (36.77 yr)  
   first obs. used      1983-05-07  
   last obs. used      2020-02-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43201  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-15 05:04:31  

Additional Information
 Earth MOID = .0315129 au 
 Jupiter MOID = 2.94411 au 
 T_jup = 4.073 
[ 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 18.3   n/a MPO254145  
rotation period rot_per 2.8174 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]

153958 (2002 AM31)          Discovered 2002-Jan-14 by LINEAR at Socorro
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

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