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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2653181058063686 9.8543e-08  
a 2.597839421366178 2.2332e-08 AU
q 1.908585586900192 2.6207e-07 AU
i 3.71360382613635 6.6394e-06 deg
node 299.7796732276595 0.00013855 deg
peri 88.59684085820898 0.00013929 deg
M 128.2353820362708 1.3604e-05 deg
tp 2456255.718626526512
(2012-Nov-24.21862653)
5.5465e-05 JED
period 1529.385192574882
4.19
1.9721e-05
5.399e-08
d
yr
n .2353887050481389 3.0353e-09 deg/d
Q 3.287093255832165 2.8257e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      525  
   data-arc span      8238 days (22.55 yr)  
   first obs. used      1991-09-14  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51392  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:54:01  

Additional Information
 Earth MOID = .916521 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 14.5 mag n/a MPO257018  

21081 (1991 RC19)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar (675)
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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