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161921 (2007 EX56)
Classification: Main-belt Asteroid          SPK-ID: 2161921
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1134253283317824 4.7695e-08  
a 2.334628991560256 1.5901e-08 au
q 2.069822931659635 1.0712e-07 au
i 7.73587397939522 4.3594e-06 deg
node 98.15099494436403 4.2469e-05 deg
peri 167.574295195664 4.9972e-05 deg
M 173.2336577310201 2.8127e-05 deg
tp 2458373.518086515857
(2018-Sep-12.01808652)
9.9589e-05 TDB
period 1302.942464014452
3.57
1.3311e-05
3.644e-08
d
yr
n .2762976953647026 2.8227e-09 deg/d
Q 2.599435051460876 1.7704e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      7231 days (19.80 yr)  
   first obs. used      2000-03-11  
   last obs. used      2019-12-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 13:43:09  

Additional Information
 Earth MOID = 1.05453 au 
 Jupiter MOID = 2.47283 au 
 T_jup = 3.548 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457594.5 (2016-Jul-25.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .113755517489588 4.7538e-08  
q 2.068734813782786 1.0673e-07 au
tp 2457071.740087818624
(2015-Feb-18.24008782)
9.6206e-05 TDB
node 98.17425107049895 4.25e-05 deg
peri 167.764876342187 5.0003e-05 deg
i 7.733732639562174 4.3579e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      7231 days (19.80 yr)  
   first obs. used      2000-03-11  
   last obs. used      2019-12-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 13:43:09  

Additional Information
 Jupiter MOID = 2.47283 au 
 T_jup = 3.548 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.259813938754927E-15 -5.035230110812725E-15 -2.854662067271735E-13 1.183874885269981E-14 -1.796396836148583E-13 1.624680246388233E-15
q -5.035230110812725E-15 1.139211059700386E-14 9.125003038152514E-13 -2.567786867903892E-14 4.913352176446397E-13 -3.683512731358262E-15
tp -2.854662067271735E-13 9.125003038152514E-13 9.255619662315487E-9 3.769554395897543E-11 2.559745786392612E-9 -1.095143669180639E-11
node 1.183874885269981E-14 -2.567786867903892E-14 3.769554395897543E-11 1.806235663044963E-9 -1.780195085780621E-9 -1.571787573882844E-11
peri -1.796396836148583E-13 4.913352176446397E-13 2.559745786392612E-9 -1.780195085780621E-9 2.500341708843474E-9 1.24778594272003E-11
i 1.624680246388233E-15 -3.683512731358262E-15 -1.095143669180639E-11 -1.571787573882844E-11 1.24778594272003E-11 1.899132361501115E-11

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 16.3   n/a MPO502937  

161921 (2007 EX56)          Discovered 2007-Mar-14 by Lowe, A. at Mayhill
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

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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
2106-Aug-27 22:56 00:02 Amphi 0.0314230818289462 0.0314066412727004 0.031439533116305 4.76654351067137 4.76654347228998 2490499.455433764 1.5528538902264 1230.46483764274 56.3792079513419 -48.2872120058308 62269.1520452769 T 18 CATAB v2.0f-lin.ifort 2020-Feb-24 13:43:23 2020-Feb-24 13:43
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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