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21182 (1994 EC2)
Classification: Main-belt Asteroid          SPK-ID: 2021182
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2545888989118184 4.5817e-08  
a 2.291890962503029 7.6936e-09 au
q 1.708400965933436 1.0427e-07 au
i 25.22389367988053 6.46e-06 deg
node 13.46247798438682 6.6412e-06 deg
peri 39.40665233711257 1.5601e-05 deg
M 358.0667520999714 1.0335e-05 deg
tp 2459207.305725075428
(2020-Dec-23.80572508)
3.6372e-05 TDB
period 1267.328947890073
3.47
6.3814e-06
1.747e-08
d
yr
n .2840620034753802 1.4303e-09 deg/d
Q 2.875380959072623 9.6522e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2038  
   data-arc span      19084 days (52.25 yr)  
   first obs. used      1968-10-22  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3792  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:16  

Additional Information
 Earth MOID = .757242 au 
 Jupiter MOID = 2.70822 au 
 T_jup = 3.432 
[ 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 13.62   n/a E2021B10  
diameter diameter 4.231 km 0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.431   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21182 (1994 EC2)          Discovered 1994-Mar-12 by Endate, K., Watanabe, K. at Kitami
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 EC2 = 1968 UB = 1999 RA43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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