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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09795141878319027 6.3898e-08  
a 3.022958460819622 3.6287e-08 AU
q 2.726855390659691 1.9101e-07 AU
i 10.12012509654979 7.0877e-06 deg
node 16.69533616842902 3.711e-05 deg
peri 282.8424386910063 5.2594e-05 deg
M 188.7448880157056 4.0736e-05 deg
tp 2457713.745917417478
(2016-Nov-21.24591742)
0.00022333 JED
period 1919.758928425115
5.26
3.4566e-05
9.464e-08
d
yr
n .1875235451022634 3.3765e-09 deg/d
Q 3.319061530979553 3.9841e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1045  
   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      .53351  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:18:30  

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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