Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1372453142215648 1.6396e-08  
a 2.689064421453843 1.3466e-08 au
q 2.32000292996938 4.2695e-08 au
i 12.3408716158147 7.0186e-07 deg
node 304.1664077857047 2.0819e-06 deg
peri 324.3721556725986 1.0643e-05 deg
M 158.4649886821739 9.0769e-06 deg
tp 2458687.524773457251
(2019-Jul-23.02477346)
3.8404e-05 TDB
period 1610.646513642803
4.41
1.2098e-05
3.312e-08
d
yr
n .2235127304164258 1.6789e-09 deg/d
Q 3.058125912938306 1.5314e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2559  
   data-arc span      9302 days (25.47 yr)  
   first obs. used      1996-02-15  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40884  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:29  

Additional Information
 Earth MOID = 1.315 au 
 Jupiter MOID = 2.13498 au 
 T_jup = 3.326 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457187.5 (2015-Jun-14.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1369736314409654 1.6288e-08  
q 2.321415650782717 4.2385e-08 au
tp 2457078.662957109111
(2015-Feb-25.16295711)
3.6329e-05 TDB
node 304.2184474537374 2.0822e-06 deg
peri 324.8110545158794 1.0709e-05 deg
i 12.33363603596758 7.0157e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2559  
   data-arc span      9302 days (25.47 yr)  
   first obs. used      1996-02-15  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40884  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:29  

Additional Information
 Jupiter MOID = 2.13498 au 
 T_jup = 3.326 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.653072164505928E-16 -6.652540219998789E-16 -1.341656252658886E-13 1.361776616178305E-14 -6.892630900436401E-14 3.393448167457803E-15
q -6.652540219998789E-16 1.796513536635182E-15 3.729611760092259E-13 -3.712778580631026E-14 1.887689347049367E-13 -9.208470866744422E-15
tp -1.341656252658886E-13 3.729611760092259E-13 1.319775537019371E-9 -1.365420944569895E-11 3.783400114179446E-10 -9.690652218747537E-12
node 1.361776616178305E-14 -3.712778580631026E-14 -1.365420944569895E-11 4.335532470158872E-12 -8.1301620765333E-12 1.035925744934795E-12
peri -6.892630900436401E-14 1.887689347049367E-13 3.783400114179446E-10 -8.1301620765333E-12 1.146878536619448E-10 -3.843115938082635E-12
i 3.393448167457803E-15 -9.208470866744422E-15 -9.690652218747537E-12 1.035925744934795E-12 -3.843115938082635E-12 4.922040203652566E-13

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-25 07:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin