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21025 (1989 SL2)
Classification: Main-belt Asteroid          SPK-ID: 2021025
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1636484578730603 4.4221e-08  
a 2.275894458643509 6.3624e-09 au
q 1.903447840204656 9.9483e-08 au
i 4.09409749416686 3.0304e-06 deg
node 106.4165222552339 6.0939e-05 deg
peri 267.0414639816117 6.1648e-05 deg
M 32.59568322000225 9.2302e-06 deg
tp 2459086.950770351279
(2020-Aug-25.45077035)
3.2157e-05 TDB
period 1254.083934907523
3.43
5.2588e-06
1.44e-08
d
yr
n .2870621255717997 1.2037e-09 deg/d
Q 2.648341077082363 7.4036e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1602  
   data-arc span      11434 days (31.30 yr)  
   first obs. used      1989-09-26  
   last obs. used      2021-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50424  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:50:35  

Additional Information
 Earth MOID = .907763 au 
 Jupiter MOID = 2.82186 au 
 T_jup = 3.588 
[ 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 15.29   n/a E2021B10  

21025 (1989 SL2)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 SL2 = 1999 NG37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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