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JPL Small-Body Database Browser
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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020387948543889 5.3721e-08  
a 5.192599871751961 9.5611e-08 au
q 4.662753238677336 3.351e-07 au
i 39.28292945542056 5.2789e-06 deg
node 131.3178649547659 7.7892e-06 deg
peri 273.5622184987633 3.4984e-05 deg
M 304.7456823525779 3.8766e-05 deg
tp 2459663.844959675141
(2022-Mar-25.34495967)
0.00047194 TDB
period 4321.909954745272
11.83
0.00011937
3.268e-07
d
yr
n .0832965063524138 2.3006e-09 deg/d
Q 5.722446504826585 1.0537e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1682  
   data-arc span      15746 days (43.11 yr)  
   first obs. used      1976-10-24  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49868  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:11:02  

Additional Information
 Earth MOID = 3.91774 au 
 Jupiter MOID = .0856469 au 
 T_jup = 2.540 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456843.5 (2014-Jul-05.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1014837047381449 5.3833e-08  
q 4.667465009878959 3.3707e-07 au
tp 2455349.172129281619
(2010-Jun-01.67212928)
0.00044373 TDB
node 131.3279198883034 7.7907e-06 deg
peri 274.0219078676257 3.5138e-05 deg
i 39.25948934898505 5.279e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1682  
   data-arc span      15746 days (43.11 yr)  
   first obs. used      1976-10-24  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49868  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:11:02  

Additional Information
 Jupiter MOID = .0856469 au 
 T_jup = 2.540 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.8979683114492E-15 -1.773100604946394E-14 -4.447333007963088E-12 -1.801602115534379E-15 -3.920234404001194E-13 8.310676210133568E-15
q -1.773100604946394E-14 1.136154913734371E-13 2.819829988468983E-11 2.051769406570783E-14 2.667331994678852E-12 -4.410980323709358E-14
tp -4.447333007963088E-12 2.819829988468983E-11 1.968990785549559E-7 -1.254416101806435E-11 1.522531529936574E-8 -1.512128821911118E-11
node -1.801602115534379E-15 2.051769406570783E-14 -1.254416101806435E-11 6.069469452000727E-11 -4.724694932861752E-11 -2.276171123957525E-12
peri -3.920234404001194E-13 2.667331994678852E-12 1.522531529936574E-8 -4.724694932861752E-11 1.234651507392405E-9 6.986682471994799E-13
i 8.310676210133568E-15 -4.410980323709358E-14 -1.512128821911118E-11 -2.276171123957525E-12 6.986682471994799E-13 2.786793459923608E-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 10.0   n/a MPO492775  
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. 2019-August); 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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