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173710 (2001 QU121)
Classification: Main-belt Asteroid          SPK-ID: 2173710
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1079031540788757 7.4718e-08  
a 2.771185592491632 2.7051e-08 au
q 2.472165926523847 2.0889e-07 au
i 6.365032453519775 8.7671e-06 deg
node 350.7965654828132 4.8549e-05 deg
peri 17.57039645820954 5.7643e-05 deg
M 350.4368771341257 3.0636e-05 deg
tp 2459045.260412510776
(2020-Jul-14.76041251)
0.00014361 TDB
period 1684.9881288654
4.61
2.4672e-05
6.755e-08
d
yr
n .2136513568451125 3.1284e-09 deg/d
Q 3.070205258459417 2.997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      6100 days (16.70 yr)  
   first obs. used      2001-08-10  
   last obs. used      2018-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56229  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-07 05:53:12  

Additional Information
 Earth MOID = 1.47161 au 
 Jupiter MOID = 2.38993 au 
 T_jup = 3.320 
[ 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 15.9   n/a MPO436862  

173710 (2001 QU121)          Discovered 2001-Aug-19 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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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
1941-Aug-26 02:39 02:01 Amphi 0.0216941780561079 0.0216926803124706 0.0216956760865861 0.862667515884265 0.862667208708838 2430232.610078952 121.328333504364 521.635749631527 71.8783484695596 88.1751375466118 44643.7593841533 T 14 CATAB v2.0e-lin.ifort 2018-May-07 05:53:14 2018-Dec-17 19:26
2047-Aug-18 12:02 01:08 Amphi 0.0163546085794971 0.016346864856654 0.0163623523516903 0.856307803192833 0.856307392702355 2468941.001323335 68.0761540201847 381.967321374799 79.6015731342726 4.57436268823399 6764.35699689157 T 14 CATAB v2.0e-lin.ifort 2018-May-07 05:53:14 2018-Dec-17 19:26
2153-Sep-16 16:53 03:09 Amphi 0.0117818260923039 0.0117525685718775 0.0118111924806381 0.914229997050174 0.91422946334048 2507686.203723167 189.470670802447 2282.27888620196 88.1612400107286 50.8165961610856 15354.7772005615 T 14 CATAB v2.0e-lin.ifort 2018-May-07 05:53:14 2018-Dec-17 19:26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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