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152869 (1999 XM254)
Classification: Main-belt Asteroid          SPK-ID: 2152869
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1266853319381448 4.2083e-08  
a 2.241121207399785 1.0678e-08 au
q 1.957204023326727 9.2842e-08 au
i .4306333265887232 4.8099e-06 deg
node 117.2411972967981 0.00068152 deg
peri 325.9303443837677 0.00068187 deg
M 107.406647241933 2.1656e-05 deg
tp 2458834.884074834389
(2019-Dec-17.38407483)
7.361e-05 TDB
period 1225.452394609644
3.36
8.7584e-06
2.398e-08
d
yr
n .2937690616000425 2.0996e-09 deg/d
Q 2.525038391472842 1.2031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      271  
   data-arc span      8890 days (24.34 yr)  
   first obs. used      1995-09-26  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54603  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:22:00  

Additional Information
 Earth MOID = .97286 au 
 Jupiter MOID = 2.66195 au 
 T_jup = 3.624 
[ 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 17.5   n/a MPO532812  

152869 (1999 XM254)          Discovered 1999-Dec-12 by Spacewatch at Kitt Peak
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Alternate Designations
 1999 XM254 = 1995 SW46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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