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415820 (2001 QJ154)
Classification: Main-belt Asteroid          SPK-ID: 2415820
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1529498903743841 8.2859e-08  
a 2.593250934441616 2.3084e-08 au
q 2.196613488305502 2.1542e-07 au
i 14.42911446476686 9.4652e-06 deg
node 13.62814426711171 3.0402e-05 deg
peri 310.2017020760898 4.7704e-05 deg
M 288.3464580096165 4.3381e-05 deg
tp 2459700.099047073397
(2022-Apr-30.59904707)
0.00018533 TDB
period 1525.335020578485
4.18
2.0367e-05
5.576e-08
d
yr
n .2360137249477624 3.1513e-09 deg/d
Q 2.98988838057773 2.6615e-08 au
  Orbit Determination Parameters
   # obs. used (total)      112  
   data-arc span      7173 days (19.64 yr)  
   first obs. used      2001-08-30  
   last obs. used      2021-04-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .72855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 07:35:58  

Additional Information
 Earth MOID = 1.21425 au 
 Jupiter MOID = 2.48101 au 
 T_jup = 3.358 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457770.5 (2017-Jan-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1522142762072844 8.2721e-08  
q 2.200073205867103 2.1452e-07 au
tp 2458172.710655721191
(2018-Feb-23.21065572)
0.00017949 TDB
node 13.65439274092318 3.0394e-05 deg
peri 309.8151458237227 4.7835e-05 deg
i 14.42797637451396 9.4638e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      112  
   data-arc span      7173 days (19.64 yr)  
   first obs. used      2001-08-30  
   last obs. used      2021-04-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .72855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 07:35:58  

Additional Information
 Jupiter MOID = 2.48101 au 
 T_jup = 3.358 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.842817470299653E-15 -1.767037347563476E-14 7.483699696048055E-12 1.130661492870164E-13 1.297540488095938E-12 8.154286010845006E-15
q -1.767037347563476E-14 4.601936274046413E-14 -1.830002697247586E-11 -2.873544892591894E-13 -3.148900793556043E-12 -2.264119676757819E-14
tp 7.483699696048055E-12 -1.830002697247586E-11 3.221620732914529E-8 2.548625479865338E-10 6.663757134402541E-9 -3.50544347500895E-11
node 1.130661492870164E-13 -2.873544892591894E-13 2.548625479865338E-10 9.237786530238535E-10 -8.412269556658293E-10 5.634457569749992E-11
peri 1.297540488095938E-12 -3.148900793556043E-12 6.663757134402541E-9 -8.412269556658293E-10 2.288233573309712E-9 -6.2941087018344E-11
i 8.154286010845006E-15 -2.264119676757819E-14 -3.50544347500895E-11 5.634457569749992E-11 -6.2941087018344E-11 8.956384427390059E-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 16.9   n/a MPO455964  

415820 (2001 QJ154)          Discovered 2001-Aug-30 by Sarounova, L. at Ondrejov
Reference: Last Updated: 2015-01-07
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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