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22021 (1999 XQ108)
Classification: Outer Main-belt Asteroid          SPK-ID: 2022021
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1063163492980054 4.3797e-08  
a 3.215314710760138 2.1261e-08 au
q 2.873474188867948 1.422e-07 au
i 2.045556764793293 4.2196e-06 deg
node 108.550043321829 0.00013767 deg
peri 95.219856608372 0.00013914 deg
M 89.49167744143755 1.9852e-05 deg
tp 2458677.003471580838
(2019-Jul-12.50347158)
0.00011581 TDB
period 2105.88018482751
5.77
2.0888e-05
5.719e-08
d
yr
n .1709498966720593 1.6956e-09 deg/d
Q 3.557155232652328 2.3522e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1302  
   data-arc span      11106 days (30.41 yr)  
   first obs. used      1990-03-17  
   last obs. used      2020-08-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51487  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:57:44  

Additional Information
 Earth MOID = 1.86993 au 
 Jupiter MOID = 1.40025 au 
 T_jup = 3.181 
[ 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 13.78   n/a E2021B10  
diameter diameter 9.045 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22021 (1999 XQ108)          Discovered 1999-Dec-04 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XQ108 = 1990 FX2 = 1997 ML11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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