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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424788049696089 5.3014e-08  
a 2.296412258238473 1.1791e-08 au
q 1.969222183967094 1.2232e-07 au
i 6.128138610138171 4.8021e-06 deg
node 133.8343981829429 4.6733e-05 deg
peri 250.5865442926203 4.925e-05 deg
M 257.2043210893549 1.6578e-05 deg
tp 2458963.448971414167
(2020-Apr-23.94897141)
5.9597e-05 TDB
period 1271.0809548977
3.48
9.7899e-06
2.68e-08
d
yr
n .2832235024943581 2.1814e-09 deg/d
Q 2.623602332509851 1.3471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      8301 days (22.73 yr)  
   first obs. used      1995-08-29  
   last obs. used      2018-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5705  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 14:51:12  

Additional Information
 Earth MOID = .981596 au 
 Jupiter MOID = 2.83932 au 
 T_jup = 3.573 
[ 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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