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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09873877693629195 5.6403e-08  
a 3.019969930952429 3.2163e-08 AU
q 2.721781793585808 1.7541e-07 AU
i 10.1303313538538 6.7927e-06 deg
node 16.60655848375213 3.2713e-05 deg
peri 283.4302241537505 4.8174e-05 deg
M 225.7198358267407 3.9089e-05 deg
tp 2457715.509344878559
(2016-Nov-23.00934488)
0.00021269 JED
period 1916.912790068966
5.25
3.0623e-05
8.384e-08
d
yr
n .187801970890417 3.0002e-09 deg/d
Q 3.318158068319049 3.5339e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      23116 days (63.29 yr)  
   first obs. used      1952-01-31  
   last obs. used      2015-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49778  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:46:26  

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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