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16989 (1999 CX)
Classification: Main-belt Asteroid          SPK-ID: 2016989
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1616267304438248 2.6992e-08  
a 2.225117755591143 6.7842e-09 au
q 1.865479247902445 5.7818e-08 au
i 3.526355732218863 2.9144e-06 deg
node 77.33950001030473 6.4444e-05 deg
peri 198.8983630759267 6.5767e-05 deg
M 91.84692523660372 1.3497e-05 deg
tp 2458891.192787597535
(2020-Feb-11.69278760)
4.5421e-05 TDB
period 1212.349745819372
3.32
5.5446e-06
1.518e-08
d
yr
n .2969440140862094 1.358e-09 deg/d
Q 2.584756263279841 7.8808e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1911  
   data-arc span      11129 days (30.47 yr)  
   first obs. used      1990-09-16  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48187  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:50:25  

Additional Information
 Earth MOID = .847671 au 
 Jupiter MOID = 2.52328 au 
 T_jup = 3.627 
[ 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 14.84   n/a E2021B10  
diameter diameter 3.263 km 0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.245   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16989 (1999 CX)          Discovered 1999-Feb-05 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CX = 1990 SY18 = 1994 XC6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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