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181421 (2006 SM262)
Classification: Main-belt Asteroid          SPK-ID: 2181421
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09108303996551785 4.0672e-08  
a 2.553544764938741 1.457e-08 au
q 2.320960145060087 1.0973e-07 au
i 1.834688541619033 4.073e-06 deg
node 78.51808439000084 0.00015285 deg
peri 249.8938104944649 0.00015512 deg
M 224.9968329729866 2.7026e-05 deg
tp 2459759.427008706653
(2022-Jun-28.92700871)
0.00011216 TDB
period 1490.437058370145
4.08
1.2756e-05
3.492e-08
d
yr
n .2415398878995098 2.0673e-09 deg/d
Q 2.786129384817396 1.5897e-08 au
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      8191 days (22.43 yr)  
   first obs. used      1998-11-27  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:09:32  

Additional Information
 Earth MOID = 1.30834 au 
 Jupiter MOID = 2.4745 au 
 T_jup = 3.432 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457395.5 (2016-Jan-08.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09151994932946124 4.052e-08  
q 2.31996076046735 1.0924e-07 au
tp 2456773.298772711127
(2014-Apr-25.79877271)
0.00011247 TDB
node 78.55547544900008 0.00015284 deg
peri 248.8706732817608 0.00015509 deg
i 1.834800650184466 4.0714e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      8191 days (22.43 yr)  
   first obs. used      1998-11-27  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:09:32  

Additional Information
 Jupiter MOID = 2.4745 au 
 T_jup = 3.432 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.641836853521286E-15 -4.399004830685137E-15 2.049983520097493E-12 -6.464737896803914E-15 4.80278608272285E-13 -6.578248368830109E-16
q -4.399004830685137E-15 1.193381193338747E-14 -5.429459467701717E-12 1.892351622868086E-14 -1.25805375664319E-12 1.829460819686733E-15
tp 2.049983520097493E-12 -5.429459467701717E-12 1.264876195948103E-8 4.570437095858279E-11 2.994798003953116E-9 -2.464941350402731E-12
node -6.464737896803914E-15 1.892351622868086E-14 4.570437095858279E-11 2.335976062231739E-8 -2.333608143858448E-8 -2.356115185561064E-10
peri 4.80278608272285E-13 -1.25805375664319E-12 2.994798003953116E-9 -2.333608143858448E-8 2.405371597949399E-8 2.349122443503337E-10
i -6.578248368830109E-16 1.829460819686733E-15 -2.464941350402731E-12 -2.356115185561064E-10 2.349122443503337E-10 1.657640711565508E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.63   n/a E2021B55  

181421 (2006 SM262)          Discovered 2006-Sep-26 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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