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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374256598591825 1.6407e-08  
a 2.688615296936701 1.35e-08 au
q 2.319130565647683 4.27e-08 au
i 12.34099303816281 7.0201e-07 deg
node 304.1652822091083 2.0823e-06 deg
peri 324.3413276030601 1.0639e-05 deg
M 114.6768248449979 8.9165e-06 deg
tp 2458687.562342983985
(2019-Jul-23.06234298)
3.8352e-05 TDB
period 1610.243017936332
4.41
1.2128e-05
3.32e-08
d
yr
n .2235687383767524 1.6839e-09 deg/d
Q 3.05810002822572 1.5356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2538  
   data-arc span      9129 days (24.99 yr)  
   first obs. used      1996-02-15  
   last obs. used      2021-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40509  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:56:15  

Additional Information
 Earth MOID = 1.31249 au 
 Jupiter MOID = 2.13605 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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