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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4515926648969701 9.4311e-09  
a 1.702939293227392 6.542e-09 au
q .9339043996410711 1.5138e-08 au
i 4.644883733791243 2.1661e-06 deg
node 144.3803032021953 1.3192e-05 deg
peri 197.9330667754184 1.0373e-05 deg
M 266.0835412618508 7.8937e-06 deg
tp 2459412.256321566083
(2021-Jul-16.75632157)
1.9008e-05 TDB
period 811.7030474534273
2.22
4.6773e-06
1.281e-08
d
yr
n .4435119482789124 2.5557e-09 deg/d
Q 2.471974186813713 9.4963e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .432  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 19:33:45  

Additional Information
 Earth MOID = .0323696 au 
 Jupiter MOID = 2.94476 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 18.25   n/a E2021B55  
rotation period rot_per 2.8174 h n/a LCDB (Rev. 2020-October); 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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