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134704 (1999 XS156)
Classification: Main-belt Asteroid          SPK-ID: 2134704
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2249433496114247 5.0183e-08  
a 2.337742059774284 9.0032e-09 au
q 1.811882530321145 1.2051e-07 au
i 2.51556353593424 4.8886e-06 deg
node 160.4626602738435 9.0817e-05 deg
peri 220.5403019696527 9.1216e-05 deg
M 302.8557298142737 1.0192e-05 deg
tp 2459207.735189465291
(2020-Dec-24.23518947)
3.7743e-05 TDB
period 1305.549409678869
3.57
7.542e-06
2.065e-08
d
yr
n .2757459789197489 1.5929e-09 deg/d
Q 2.863601589227423 1.1028e-08 au
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      9099 days (24.91 yr)  
   first obs. used      1995-09-02  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51844  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:57:39  

Additional Information
 Earth MOID = .815447 au 
 Jupiter MOID = 2.5951 au 
 T_jup = 3.531 
[ 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 16.7   n/a MPO268072  
rotation period rot_per 87.027 h n/a LCDB (Rev. 2019-August); 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.]

134704 (1999 XS156)          Discovered 1999-Dec-08 by LINEAR at Socorro
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

[ show close-approach data ]
Alternate Designations
 1999 XS156 = 2002 PO13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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