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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09873877631819276 5.7719e-08  
a 3.019969930690115 3.3117e-08 AU
q 2.721781795216036 1.7794e-07 AU
i 10.13033168253972 6.8011e-06 deg
node 16.60656600273336 3.3788e-05 deg
peri 283.4302168182742 4.8871e-05 deg
M 225.7198358937932 3.9135e-05 deg
tp 2457715.509344428363
(2016-Nov-23.00934443)
0.00021308 JED
period 1916.912789819212
5.25
3.1532e-05
8.633e-08
d
yr
n .1878019709148857 3.0892e-09 deg/d
Q 3.318158066164194 3.6387e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1169  
   data-arc span      23066 days (63.15 yr)  
   first obs. used      1952-01-31  
   last obs. used      2015-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49695  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:16:13  

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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