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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .204649390577039 4.0289e-08  
a 2.765266812372281 1.1711e-08 au
q 2.199356644437382 1.1043e-07 au
i 1.873914228872637 4.8851e-06 deg
node 322.528511145884 0.00013232 deg
peri 170.99378615 0.00013284 deg
M 191.9943281438072 1.0823e-05 deg
tp 2460180.336408113428
(2023-Aug-23.83640811)
5.1483e-05 TDB
period 1679.592741144904
4.60
1.0669e-05
2.921e-08
d
yr
n .2143376731639147 1.3615e-09 deg/d
Q 3.33117698030718 1.4107e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1362  
   data-arc span      9791 days (26.81 yr)  
   first obs. used      1994-09-12  
   last obs. used      2021-07-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52574  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:03:47  

Additional Information
 Earth MOID = 1.21427 au 
 Jupiter MOID = 1.71658 au 
 T_jup = 3.308 
[ 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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