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49971 (1999 XZ249)
Classification: Main-belt Asteroid          SPK-ID: 2049971
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1423624667526859 5.1704e-08  
a 2.295387601881636 1.1094e-08 au
q 1.968610560724234 1.1916e-07 au
i 6.129972529044772 4.7514e-06 deg
node 133.8253872408705 4.607e-05 deg
peri 250.7910714181111 4.8615e-05 deg
M 10.34981670854054 1.6847e-05 deg
tp 2458963.981525096672
(2020-Apr-24.48152510)
5.9335e-05 TDB
period 1270.230317639304
3.48
9.209e-06
2.521e-08
d
yr
n .2834131692503233 2.0547e-09 deg/d
Q 2.622164643039038 1.2674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      727  
   data-arc span      9194 days (25.17 yr)  
   first obs. used      1995-08-29  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56462  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:29:52  

Additional Information
 Earth MOID = .98182 au 
 Jupiter MOID = 2.84223 au 
 T_jup = 3.574 
[ 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 15.6   n/a MPO436133  

49971 (1999 XZ249)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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