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183618 (2003 US221)
Classification: Main-belt Asteroid          SPK-ID: 2183618
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2302200357971161 3.7093e-08  
a 2.367267666224111 1.5361e-08 au
q 1.822275219364641 9.1507e-08 au
i 3.282579695649049 4.313e-06 deg
node 114.8708034204519 9.296e-05 deg
peri 191.9269431969626 9.3762e-05 deg
M 314.9751564696962 1.4519e-05 deg
tp 2459366.886921974745
(2021-Jun-01.38692197)
5.4448e-05 TDB
period 1330.360912206014
3.64
1.2949e-05
3.545e-08
d
yr
n .2706032601356616 2.6339e-09 deg/d
Q 2.912260113083581 1.8897e-08 au
  Orbit Determination Parameters
   # obs. used (total)      316  
   data-arc span      10061 days (27.55 yr)  
   first obs. used      1992-10-01  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64393  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 04:39:52  

Additional Information
 Earth MOID = .805508 au 
 Jupiter MOID = 2.34764 au 
 T_jup = 3.509 
[ 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 16.99   n/a E2021B55  

183618 (2003 US221)          Discovered 2003-Oct-22 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1961-Aug-25 21:54 00:04 Europ 0.0451201793612279 0.045116190571289 0.0451241700030456 4.32915084601387 4.32915079160143 2437537.412328664 4.21048381363167 531.208987906789 75.65920435862 -69.533633025827 83651.9901490648 T 15 CATAB v2.0f-lin.ifort 2020-May-21 04:40:03 2020-May-21 04:40

Alternate Designations
 2003 US221 = 2006 KB22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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