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21167 (1993 XQ)
Classification: Main-belt Asteroid          SPK-ID: 2021167
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1018467869661512 3.5579e-08  
a 2.924202318886798 1.4101e-08 au
q 2.626381708269209 1.0334e-07 au
i 1.201557895693566 3.7917e-06 deg
node 222.666334924836 0.00020019 deg
peri 182.3332043747235 0.00020125 deg
M 169.2765235766692 2.081e-05 deg
tp 2458341.676769560578
(2018-Aug-11.17676956)
0.00010454 TDB
period 1826.457422597994
5.00
1.3211e-05
3.617e-08
d
yr
n .1971028700400406 1.4257e-09 deg/d
Q 3.222022929504387 1.5537e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1541  
   data-arc span      9661 days (26.45 yr)  
   first obs. used      1993-12-09  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:33  

Additional Information
 Earth MOID = 1.63459 au 
 Jupiter MOID = 2.13144 au 
 T_jup = 3.271 
[ 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 13.98   n/a E2021B10  
diameter diameter 4.674 km 1.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.268   0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21167 (1993 XQ)          Discovered 1993-Dec-09 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 XQ = 1998 XB83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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