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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09873878107657315 5.6158e-08  
a 3.019969933479351 3.2007e-08 AU
q 2.7217817833597 1.7493e-07 AU
i 10.13033133341027 6.7926e-06 deg
node 16.60656040841469 3.2486e-05 deg
peri 283.4302225458813 4.804e-05 deg
M 225.7198347418474 3.9069e-05 deg
tp 2457715.509351552766
(2016-Nov-23.00935155)
0.00021255 JED
period 1916.912792474896
5.25
3.0475e-05
8.344e-08
d
yr
n .1878019706547055 2.9856e-09 deg/d
Q 3.318158083599002 3.5168e-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 = 1.73091 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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