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21043 (1990 RT2)
Classification: Main-belt Asteroid          SPK-ID: 2021043
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .171665133576587 9.322e-08  
a 2.698942327687075 2.2057e-08 au
q 2.235628032489169 2.5359e-07 au
i 12.01218129031372 1.0086e-05 deg
node 356.4934359248002 3.2393e-05 deg
peri 15.70240972372187 3.9162e-05 deg
M 289.7473491490848 2.5256e-05 deg
tp 2457916.545090951383
(2017-Jun-12.04509095)
0.00011589 JED
period 1619.529389488023
4.43
1.9853e-05
5.435e-08
d
yr
n .222286796606887 2.7249e-09 deg/d
Q 3.162256622884982 2.5843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      853  
   data-arc span      12285 days (33.63 yr)  
   first obs. used      1981-09-03  
   last obs. used      2015-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48489  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:31  

Additional Information
 Earth MOID = 1.23613 au 
 Jupiter MOID = 2.30441 au 
 T_jup = 3.316 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5 mag n/a MPO337436  

21043 (1990 RT2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RT2 = 1981 RT7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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