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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07636337705642253 2.4031e-08  
a 3.037891515554949 1.6335e-08 au
q 2.805907860296119 7.302e-08 au
i 11.13814752385297 4.6612e-07 deg
node 77.77022047872212 1.4146e-06 deg
peri 199.8180909043201 7.8625e-06 deg
M 121.8159105959801 1.1056e-05 deg
tp 2458546.077332847745
(2019-Mar-03.57733285)
5.6334e-05 TDB
period 1934.001552196141
5.30
1.5599e-05
4.271e-08
d
yr
n .1861425600156342 1.5013e-09 deg/d
Q 3.269875170813778 1.7582e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2264  
   data-arc span      15442 days (42.28 yr)  
   first obs. used      1978-11-29  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4662  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:28:33  

Additional Information
 Earth MOID = 1.79048 au 
 Jupiter MOID = 1.81931 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 12.88   n/a E2021B10  

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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