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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1999049088362215 3.0424e-08  
a 2.394951504895223 8.5144e-09 au
q 1.916188942641972 7.3615e-08 au
i 8.910155974282418 5.1909e-06 deg
node 354.3981211979891 2.0068e-05 deg
peri 243.6548147562042 2.4504e-05 deg
M 83.87808828432976 1.364e-05 deg
tp 2459081.079776210590
(2020-Aug-19.57977621)
5.1359e-05 TDB
period 1353.765719829853
3.71
7.2192e-06
1.977e-08
d
yr
n .2659248899028456 1.4181e-09 deg/d
Q 2.873714067148474 1.0216e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1684  
   data-arc span      10035 days (27.47 yr)  
   first obs. used      1994-02-16  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47659  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:06  

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 14.49   n/a MPO636382  
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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