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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09795141310029901 6.4253e-08  
a 3.022958492539885 3.8371e-08 AU
q 2.726855436452054 1.9029e-07 AU
i 10.12011851767066 6.9071e-06 deg
node 16.69536838811235 3.6749e-05 deg
peri 282.8423896795396 5.1297e-05 deg
M 188.7448961083013 3.9461e-05 deg
tp 2457713.745888636583
(2016-Nov-21.24588864)
0.00021731 JED
period 1919.758958641504
5.26
3.6552e-05
1.001e-07
d
yr
n .1875235421507032 3.5704e-09 deg/d
Q 3.319061548627716 4.213e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1044  
   data-arc span      22667 days (62.06 yr)  
   first obs. used      1952-01-31  
   last obs. used      2014-02-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50113  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 23:40:53  

Additional Information
 Earth MOID = 1.73414 AU 
 T_jup = 3.215 
[ 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 (327)
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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