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80308 (1999 XX71)
Classification: Main-belt Asteroid          SPK-ID: 2080308
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 .1429839075716514 3.9547e-08  
a 2.360472532206383 8.697e-09 au
q 2.022962945835963 9.0817e-08 au
i 1.17561702400501 3.5524e-06 deg
node 240.6673308332448 0.0001846 deg
peri 302.0409842472279 0.00018496 deg
M 143.4448169837797 1.2595e-05 deg
tp 2458472.688056338806
(2018-Dec-20.18805634)
4.5073e-05 TDB
period 1324.636914134833
3.63
7.3208e-06
2.004e-08
d
yr
n .2717725862525344 1.502e-09 deg/d
Q 2.697982118576802 9.9405e-09 au
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      8638 days (23.65 yr)  
   first obs. used      1997-03-08  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49451  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:20:04  

Additional Information
 Earth MOID = 1.02564 au 
 Jupiter MOID = 2.26362 au 
 T_jup = 3.537 
[ 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 16.2   n/a MPO432351  

80308 (1999 XX71)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1999 XX71 = 1997 EF55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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