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21273 (1996 SW2)
Classification: Main-belt Asteroid          SPK-ID: 2021273
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1410396515719873 2.8282e-08  
a 2.242899557520975 5.8505e-09 au
q 1.926561785417252 6.451e-08 au
i 1.891371317584214 3.3684e-06 deg
node 9.286443934125812 9.5996e-05 deg
peri 127.7395436913291 9.6844e-05 deg
M 309.9217856109994 1.1975e-05 deg
tp 2459371.170908021328
(2021-Jun-05.67090802)		 4.0887e-05 TDB
period 1226.911295406996
3.36		 4.8005e-06
1.314e-08		 d
yr
n .2934197454597394 1.1481e-09 deg/d
Q 2.559237329624698 6.6757e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1331  
   data-arc span      10964 days (30.02 yr)  
   first obs. used      1991-01-11  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50521  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:43  

Additional Information
 Earth MOID = .940742 au 
 Jupiter MOID = 2.46184 au 
 T_jup = 3.619 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.59   n/a E2021B10  

21273 (1996 SW2)          Discovered 1996-Sep-19 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1996 SW2 = 1998 FU46 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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