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21081 (1991 RC19)
Classification: Main-belt Asteroid          SPK-ID: 2021081
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2652003191658183 8.678e-08  
a 2.598589307063328 2.219e-08 au
q 1.90944259344925 2.3269e-07 au
i 3.713141586045447 5.8007e-06 deg
node 299.7768080169847 0.00013083 deg
peri 88.48913623580734 0.00013123 deg
M 316.6715085237082 1.2962e-05 deg
tp 2457784.651798867582
(2017-Jan-31.15179887)
5.6589e-05 JED
period 1530.047442999587
4.19
1.9598e-05
5.366e-08
d
yr
n .2352868217564788 3.0138e-09 deg/d
Q 3.287736020677405 2.8075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      607  
   data-arc span      8683 days (23.77 yr)  
   first obs. used      1991-09-14  
   last obs. used      2015-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50157  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:28:25  

Additional Information
 Earth MOID = .917289 au 
 Jupiter MOID = 2.18859 au 
 T_jup = 3.362 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6 mag n/a MPO290623  

21081 (1991 RC19)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RC19 = 2000 YZ62 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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