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134502 (1999 CW81)
Classification: Main-belt Asteroid          SPK-ID: 2134502
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2949179591035512 3.5841e-08  
a 2.690976893355066 9.9149e-09 au
q 1.897359479971975 9.5884e-08 au
i 7.555762408840334 5.4572e-06 deg
node 311.7804713287972 2.7548e-05 deg
peri 140.9486796784279 2.9183e-05 deg
M 18.8060187351387 8.4941e-06 deg
tp 2459116.271756602269
(2020-Sep-23.77175660)
3.7816e-05 TDB
period 1612.365065154739
4.41
8.9111e-06
2.44e-08
d
yr
n .2232744976804931 1.234e-09 deg/d
Q 3.484594306738156 1.2839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1098  
   data-arc span      11321 days (31.00 yr)  
   first obs. used      1990-01-26  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 10:00:07  

Additional Information
 Earth MOID = .920577 au 
 Jupiter MOID = 1.74765 au 
 T_jup = 3.296 
[ 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 14.6   n/a MPO366726  
rotation period rot_per 10.434 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

134502 (1999 CW81)          Discovered 1999-Feb-12 by LINEAR at Socorro
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

[ show close-approach data ]
Alternate Designations
 1999 CW81 = 1990 BT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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