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23973 (1999 CA4)
Classification: Main-belt Asteroid          SPK-ID: 2023973
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09921538949705458 5.6359e-08  
a 3.017194975860124 3.1219e-08 au
q 2.717842801141606 1.7569e-07 au
i 10.13609656963566 6.7965e-06 deg
node 16.5934264027674 3.2465e-05 deg
peri 283.9414680000082 4.7915e-05 deg
M 300.4188783129829 3.9387e-05 deg
tp 2457717.317866462641
(2016-Nov-24.81786646)
0.00021146 JED
period 1914.271311065358
5.24
2.9711e-05
8.134e-08
d
yr
n .1880611164776051 2.9188e-09 deg/d
Q 3.316547150578642 3.4317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1224  
   data-arc span      23149 days (63.38 yr)  
   first obs. used      1952-01-31  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49781  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:34:08  

Additional Information
 Earth MOID = 1.7241 au 
 Jupiter MOID = 1.9566 au 
 T_jup = 3.216 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.6 mag n/a MPO279764  

23973 (1999 CA4)          Discovered 1999-Feb-05 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 CA4 = 1991 UG 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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