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20722 (1999 XZ109)
Classification: Main-belt Asteroid          SPK-ID: 2020722
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .076512347624068 3.4924e-08  
a 3.037372721294523 1.8082e-08 au
q 2.804976203778975 1.0417e-07 au
i 11.13863743757273 4.1747e-06 deg
node 77.7674033485509 2.0442e-05 deg
peri 199.7132468026663 3.5134e-05 deg
M 84.67876596953262 2.9136e-05 deg
tp 2458545.703013036429
(2019-Mar-03.20301304)
0.00015634 TDB
period 1933.506156263476
5.29
1.7266e-05
4.727e-08
d
yr
n .1861902527870428 1.6626e-09 deg/d
Q 3.269769238810071 1.9466e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1978  
   data-arc span      15310 days (41.92 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4803  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:05  

Additional Information
 Earth MOID = 1.79135 au 
 Jupiter MOID = 1.82023 au 
 T_jup = 3.208 
[ 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 12.8   n/a MPO347684  

20722 (1999 XZ109)          Discovered 1999-Dec-04 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XZ109 = 1978 WW10 = 1980 DB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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