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181549 (2006 US238)
Classification: Main-belt Asteroid          SPK-ID: 2181549
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07881553145139697 3.9102e-08  
a 2.346154874366509 1.2963e-08 au
q 2.161241431076027 8.7302e-08 au
i 2.893152440966494 5.0838e-06 deg
node 306.93497409 9.6894e-05 deg
peri 293.8217878922984 0.0001062 deg
M 126.7364319503954 4.3897e-05 deg
tp 2458738.403777509292
(2019-Sep-11.90377751)
0.00016112 TDB
period 1312.603152357689
3.59
1.0878e-05
2.978e-08
d
yr
n .2742641592421673 2.273e-09 deg/d
Q 2.531068317656991 1.3984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      435  
   data-arc span      9205 days (25.20 yr)  
   first obs. used      1995-08-25  
   last obs. used      2020-11-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:03  

Additional Information
 Earth MOID = 1.14896 au 
 Jupiter MOID = 2.47296 au 
 T_jup = 3.555 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457771.5 (2017-Jan-18.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07805905689083992 3.9039e-08  
q 2.163713750368483 8.7068e-08 au
tp 2457426.151345674289
(2016-Feb-07.65134567)
0.00016637 TDB
node 306.97525665987 9.6958e-05 deg
peri 294.1310192490082 0.00010643 deg
i 2.891723581629294 5.0811e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      435  
   data-arc span      9205 days (25.20 yr)  
   first obs. used      1995-08-25  
   last obs. used      2020-11-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:03  

Additional Information
 Jupiter MOID = 2.47296 au 
 T_jup = 3.555 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.524020571301525E-15 -3.37257830362685E-15 -3.168782523787881E-12 -4.466991521778756E-15 -8.306155782317867E-13 5.607232922686522E-18
q -3.37257830362685E-15 7.580770708091693E-15 6.718497646648808E-12 1.013840628122159E-14 1.767023865374182E-12 1.79014615948928E-16
tp -3.168782523787881E-12 6.718497646648808E-12 2.767757234654937E-8 6.531640892683524E-11 7.3279094196922E-9 3.424756483077699E-12
node -4.466991521778756E-15 1.013840628122159E-14 6.531640892683524E-11 9.400821078179111E-9 -9.371383408508396E-9 2.379321163130444E-10
peri -8.306155782317867E-13 1.767023865374182E-12 7.3279094196922E-9 -9.371383408508396E-9 1.132735744293294E-8 -2.367255799486316E-10
i 5.607232922686522E-18 1.79014615948928E-16 3.424756483077699E-12 2.379321163130444E-10 -2.367255799486316E-10 2.581725769423414E-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 17.03   n/a MPCxxxxx  

181549 (2006 US238)          Discovered 2006-Oct-23 by Spacewatch at Kitt Peak
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

Alternate Designations
 2006 US238 = 1995 QQ15 = 2003 YQ144 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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