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JPL Small-Body Database Browser
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173353 (1999 XQ251)
Classification: Main-belt Asteroid          SPK-ID: 2173353
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .174543328143442 3.7152e-08  
a 2.428138019239992 1.3129e-08 au
q 2.004322728170219 8.9466e-08 au
i 1.977842882695807 4.8459e-06 deg
node 194.2568696498015 0.00013416 deg
peri 143.2738339802531 0.0001352 deg
M 112.486604055521 1.8357e-05 deg
tp 2458168.675990555082
(2018-Feb-19.17599055)
6.8492e-05 TDB
period 1382.001392125237
3.78
1.1209e-05
3.069e-08
d
yr
n .2604917781207103 2.1127e-09 deg/d
Q 2.851953310309765 1.542e-08 au
  Orbit Determination Parameters
   # obs. used (total)      373  
   data-arc span      9540 days (26.12 yr)  
   first obs. used      1992-12-25  
   last obs. used      2019-02-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5592  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:40:07  

Additional Information
 Earth MOID = .99462 au 
 Jupiter MOID = 2.52619 au 
 T_jup = 3.487 
[ 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 16.8   n/a MPO417934  

173353 (1999 XQ251)          Discovered 1999-Dec-09 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1999 XQ251 = 2005 EW244 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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