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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2626113895791746 4.2036e-08  
a 2.600353685860437 1.3483e-08 au
q 1.917471191019299 1.1435e-07 au
i 3.715078936556422 4.251e-06 deg
node 299.6902091646381 6.5529e-05 deg
peri 88.41106996048021 6.6158e-05 deg
M 333.0738292070003 1.1391e-05 deg
tp 2459315.056346873300
(2021-Apr-10.55634687)
4.9112e-05 TDB
period 1531.606004857915
4.19
1.1912e-05
3.261e-08
d
yr
n .2350473939499843 1.8281e-09 deg/d
Q 3.283236180701575 1.7024e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      10714 days (29.33 yr)  
   first obs. used      1991-09-14  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49248  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:38:39  

Additional Information
 Earth MOID = .925457 au 
 Jupiter MOID = 2.19739 au 
 T_jup = 3.362 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.63   n/a E2021B10  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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