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JPL Small-Body Database Browser
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20735 (1999 XU169)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020735
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1411210776100407 3.9454e-08  
a 3.214437342855616 2.657e-08 au
q 2.760812481121875 1.3288e-07 au
i 13.44744328949134 4.6553e-06 deg
node 76.26345760614093 1.8844e-05 deg
peri 269.5978708661265 2.535e-05 deg
M 225.170852114963 1.939e-05 deg
tp 2459388.882840329419
(2021-Jun-23.38284033)
0.0001174 TDB
period 2105.018291449784
5.76
2.61e-05
7.146e-08
d
yr
n .1710198915906133 2.1204e-09 deg/d
Q 3.668062204589356 3.032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1447  
   data-arc span      10201 days (27.93 yr)  
   first obs. used      1991-06-06  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50441  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:55:11  

Additional Information
 Earth MOID = 1.79561 au 
 Jupiter MOID = 1.87365 au 
 T_jup = 3.132 
[ 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 12.9   n/a MPO347684  
rotation period rot_per 7.855 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20735 (1999 XU169)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XU169 = 1991 LO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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