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21213 (1994 RL7)
Classification: Main-belt Asteroid          SPK-ID: 2021213
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2054101443478642 4.0488e-08  
a 2.763097451707125 1.1194e-08 au
q 2.195529205304748 1.1073e-07 au
i 1.876348511581245 4.9291e-06 deg
node 322.5159445694619 0.00014224 deg
peri 170.5998096198474 0.00014277 deg
M 150.5487383202824 1.1405e-05 deg
tp 2458498.935912362193
(2019-Jan-15.43591236)
5.2284e-05 TDB
period 1677.616660010126
4.59
1.0195e-05
2.791e-08
d
yr
n .2145901436135161 1.3041e-09 deg/d
Q 3.330665698109501 1.3494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1329  
   data-arc span      9409 days (25.76 yr)  
   first obs. used      1994-09-12  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5281  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:18  

Additional Information
 Earth MOID = 1.20982 au 
 Jupiter MOID = 1.71858 au 
 T_jup = 3.309 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.37   n/a E2021B10  
diameter diameter 3.245 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.292   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21213 (1994 RL7)          Discovered 1994-Sep-12 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1994 RL7 = 1996 AH2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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