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21255 (1996 CD2)
Classification: Main-belt Asteroid          SPK-ID: 2021255
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1372453141317078 1.6404e-08  
a 2.689064421373708 1.3473e-08 au
q 2.320002930141874 4.2706e-08 au
i 12.34087161417508 7.02e-07 deg
node 304.1664077848548 2.0821e-06 deg
peri 324.3721557523663 1.0653e-05 deg
M 158.4649886433069 9.0793e-06 deg
tp 2458687.524773662834
(2019-Jul-23.02477366)
3.842e-05 TDB
period 1610.646513570807
4.41
1.2105e-05
3.314e-08
d
yr
n .223512730426417 1.6798e-09 deg/d
Q 3.058125912605541 1.5322e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      9129 days (24.99 yr)  
   first obs. used      1996-02-15  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41008  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:41  

Additional Information
 Earth MOID = 1.315 au 
 Jupiter MOID = 2.13498 au 
 T_jup = 3.326 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.38   n/a E2021B10  
diameter diameter 6.356 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.252   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21255 (1996 CD2)          Discovered 1996-Feb-15 by JPL/GEODSS NEAT at Haleakala
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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