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2146 Stentor (1976 UQ)
Classification: Jupiter Trojan          SPK-ID: 2002146
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1021014065908917 2.5347e-08  
a 5.190667134115622 8.2203e-08 au
q 4.660692718577304 1.8674e-07 au
i 39.2852248213817 7.1995e-07 deg
node 131.3205212999155 4.0574e-06 deg
peri 273.8552483298374 1.6763e-05 deg
M 321.1550684062158 2.0664e-05 deg
tp 2459666.584924850752
(2022-Mar-28.08492485)
0.00025128 TDB
period 4319.497192089781
11.83
0.00010261
2.809e-07
d
yr
n .08334303368902787 1.9798e-09 deg/d
Q 5.72064154965394 9.0596e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2031  
   data-arc span      16146 days (44.21 yr)  
   first obs. used      1976-10-24  
   last obs. used      2021-01-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46158  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:24:13  

Additional Information
 Earth MOID = 3.91413 au 
 Jupiter MOID = .0866893 au 
 T_jup = 2.540 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457129.5 (2015-Apr-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1012174715411924 2.5378e-08  
q 4.668691515390566 1.8702e-07 au
tp 2455346.393214555134
(2010-May-29.89321455)
0.0002374 TDB
node 131.3261727479967 4.0565e-06 deg
peri 273.8368987683094 1.673e-05 deg
i 39.25881210068346 7.2201e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2031  
   data-arc span      16146 days (44.21 yr)  
   first obs. used      1976-10-24  
   last obs. used      2021-01-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46158  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:24:13  

Additional Information
 Jupiter MOID = .0866893 au 
 T_jup = 2.540 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.440241409831825E-16 -4.504943114448313E-15 1.683490485127196E-13 -3.446853800392842E-15 -5.145715566411799E-14 -3.070767731810204E-15
q -4.504943114448313E-15 3.497673155010752E-14 -2.145298722597126E-12 2.287417619293942E-14 4.459542857249046E-13 1.841490626977289E-14
tp 1.683490485127196E-13 -2.145298722597126E-12 5.635696749179444E-8 3.969269646755351E-11 3.812268641106596E-9 1.950829224636507E-11
node -3.446853800392842E-15 2.287417619293942E-14 3.969269646755351E-11 1.645495134186605E-11 -9.079689718739849E-12 1.725216233948269E-12
peri -5.145715566411799E-14 4.459542857249046E-13 3.812268641106596E-9 -9.079689718739849E-12 2.798822706867983E-10 3.090261230447646E-13
i -3.070767731810204E-15 1.841490626977289E-14 1.950829224636507E-11 1.725216233948269E-12 3.090261230447646E-13 5.213030280265953E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.99   n/a E2021B10  
diameter diameter 50.755 km 0.330 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 16.40 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.]
geometric albedo albedo 0.082   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

2146 Stentor (1976 UQ)          Discovered 1976-Oct-24 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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