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102531 (1999 UP4)
Classification: Main-belt Asteroid          SPK-ID: 2102531
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2112276890540747 3.6963e-08  
a 2.362997392565293 8.9053e-09 au
q 1.863866914092922 8.9949e-08 au
i 2.688478521665642 4.013e-06 deg
node 16.4476689265487 8.4571e-05 deg
peri 357.590213905203 8.5098e-05 deg
M 355.3682796496961 1.1034e-05 deg
tp 2459413.569984226500
(2021-Jul-18.06998423)
4.0722e-05 TDB
period 1326.762813116913
3.63
7.5001e-06
2.053e-08
d
yr
n .2713371195219632 1.5339e-09 deg/d
Q 2.862127871037664 1.0786e-08 au
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      8542 days (23.39 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:42:25  

Additional Information
 Earth MOID = .863843 au 
 Jupiter MOID = 2.60409 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457303.5 (2015-Oct-08.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2107802661530919 3.6769e-08  
q 1.865887998531597 8.9388e-08 au
tp 2456760.656311928319
(2014-Apr-13.15631193)
3.4886e-05 TDB
node 16.5055257840957 8.4575e-05 deg
peri 357.7897607746719 8.5111e-05 deg
i 2.6887001583649 4.011e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      8542 days (23.39 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:42:25  

Additional Information
 Jupiter MOID = 2.60409 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.351938832548963E-15 -3.277900088878463E-15 -3.293414691074275E-13 -1.105660603207617E-14 -7.704238232466996E-14 -2.677170071711327E-16
q -3.277900088878463E-15 7.990263882985926E-15 8.319967084411192E-13 2.569915591298822E-14 2.004637705496934E-13 6.756224725297818E-16
tp -3.293414691074275E-13 8.319967084411192E-13 1.217015003043989E-9 8.440978203599431E-12 3.466770560803026E-10 1.012647173109801E-14
node -1.105660603207617E-14 2.569915591298822E-14 8.440978203599431E-12 7.152973019216149E-9 -7.142409415512066E-9 -3.927216974337738E-11
peri -7.704238232466996E-14 2.004637705496934E-13 3.466770560803026E-10 -7.142409415512066E-9 7.243907682922475E-9 3.923839452022449E-11
i -2.677170071711327E-16 6.756224725297818E-16 1.012647173109801E-14 -3.927216974337738E-11 3.923839452022449E-11 1.608834388579848E-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 16.08   n/a E2021B55  
diameter diameter 1.461 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102531 (1999 UP4)          Discovered 1999-Oct-31 by Sarounova, L. at Ondrejov
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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