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21180 (1994 DC)
Classification: Main-belt Asteroid          SPK-ID: 2021180
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1999049092775738 3.1022e-08  
a 2.394951504661087 8.7906e-09 au
q 1.916188941397623 7.5391e-08 au
i 8.910155992628287 5.192e-06 deg
node 354.3981261352827 2.0624e-05 deg
peri 243.6548102956127 2.5059e-05 deg
M 83.87808802193187 1.3692e-05 deg
tp 2459081.079777243581
(2020-Aug-19.57977724)
5.1594e-05 TDB
period 1353.765719631332
3.71
7.4535e-06
2.041e-08
d
yr
n .2659248899418417 1.4641e-09 deg/d
Q 2.873714067924551 1.0548e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1632  
   data-arc span      9987 days (27.34 yr)  
   first obs. used      1994-02-16  
   last obs. used      2021-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47903  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:11  

Additional Information
 Earth MOID = .925216 au 
 Jupiter MOID = 2.19323 au 
 T_jup = 3.486 
[ 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 14.48   n/a E2021B10  
diameter diameter 3.198 km 1.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21180 (1994 DC)          Discovered 1994-Feb-16 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 DC = 1999 TF208 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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