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4834 Thoas (1989 AM2)
Classification: Jupiter Trojan          SPK-ID: 2004834
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1376915511284799 3.3943e-08  
a 5.208744428592246 9.3448e-08 au
q 4.491544328787552 2.1768e-07 au
i 28.46188783659557 1.938e-06 deg
node 75.99511039659028 5.145e-06 deg
peri 352.3781604816525 1.573e-05 deg
M 308.8091082489702 2.0538e-05 deg
tp 2460013.930664209527
(2023-Mar-10.43066421)
0.00025858 TDB
period 4342.081794481698
11.89
0.00011685
3.199e-07
d
yr
n .08290953902745911 2.2312e-09 deg/d
Q 5.925944528396941 1.0632e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1823  
   data-arc span      12625 days (34.57 yr)  
   first obs. used      1986-12-02  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48153  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:28:34  

Additional Information
 Earth MOID = 3.50768 au 
 Jupiter MOID = .582 au 
 T_jup = 2.741 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456818.5 (2014-Jun-10.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1357041731418215 3.3525e-08  
q 4.510929825846923 2.1468e-07 au
tp 2455663.720897476782
(2011-Apr-12.22089748)
0.0002007 TDB
node 76.02963937753543 5.142e-06 deg
peri 352.0406782839627 1.5898e-05 deg
i 28.46551865068287 1.94e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1823  
   data-arc span      12625 days (34.57 yr)  
   first obs. used      1986-12-02  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48153  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:28:34  

Additional Information
 Jupiter MOID = .582 au 
 T_jup = 2.741 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.123898437816456E-15 -6.701531437697761E-15 1.303943894776793E-13 1.046865871143086E-14 -1.077497676629499E-13 -2.008609838289108E-15
q -6.701531437697761E-15 4.608829521920662E-14 4.197725061137255E-12 -5.765439782035437E-14 1.197475042434274E-12 1.280434129659993E-14
tp 1.303943894776793E-13 4.197725061137255E-12 4.027921617911641E-8 2.906841746204285E-12 2.936110480349244E-9 -1.081667230425057E-11
node 1.046865871143086E-14 -5.765439782035437E-14 2.906841746204285E-12 2.643979372144918E-11 -2.328396340659763E-11 -8.963875027895719E-12
peri -1.077497676629499E-13 1.197475042434274E-12 2.936110480349244E-9 -2.328396340659763E-11 2.527404131973478E-10 7.222394770912217E-12
i -2.008609838289108E-15 1.280434129659993E-14 -1.081667230425057E-11 -8.963875027895719E-12 7.222394770912217E-12 3.763780579243572E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.23   n/a E2021B10  
diameter diameter 72.331 km 0.460 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 18.192 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bull. 38, 116-120.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 15-22.]
[Stephens, R.D.; Coley, D.R.; Warner, B.D.; French, L.M. (2016) Minor Planet Bull. 43, 323-331.]
geometric albedo albedo 0.085   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4834 Thoas (1989 AM2)          Discovered 1989-Jan-11 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 AM2 = 1975 XX3 = 1986 XN = 1987 WP2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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