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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1712206539238871 9.6165e-08  
a 2.69943888406736 2.3184e-08 AU
q 2.237239193109779 2.6012e-07 AU
i 12.01085428926811 1.0252e-05 deg
node 356.4945146248257 3.5617e-05 deg
peri 15.8021668038195 4.3687e-05 deg
M 156.2315290517649 2.5397e-05 deg
tp 2456297.468380187305
(2013-Jan-04.96838019)
0.00011093 JED
period 1619.976356044703
4.44
2.0869e-05
5.714e-08
d
yr
n .2222254656104782 2.8628e-09 deg/d
Q 3.161638575024942 2.7153e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      784  
   data-arc span      12191 days (33.38 yr)  
   first obs. used      1981-09-03  
   last obs. used      2015-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4929  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:58:29  

Additional Information
 Earth MOID = 1.23899 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 13.4 mag n/a MPO324503  

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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