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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2653312930454224 8.937e-08  
a 2.597677809207969 2.2197e-08 AU
q 1.908432597175419 2.3905e-07 AU
i 3.71353776662342 6.0397e-06 deg
node 299.7773114317304 0.00013367 deg
peri 88.57027645804595 0.00013412 deg
M 175.3609167018118 1.2347e-05 deg
tp 2456255.585102494530
(2012-Nov-24.08510249)
4.8378e-05 JED
period 1529.242479713831
4.19
1.9601e-05
5.366e-08
d
yr
n .2354106721305357 3.0173e-09 deg/d
Q 3.286923021240519 2.8086e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      591  
   data-arc span      8655 days (23.70 yr)  
   first obs. used      1991-09-14  
   last obs. used      2015-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50702  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:38  

Additional Information
 Earth MOID = .917477 AU 
 T_jup = 3.363 
[ 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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