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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1370980824779633 6.1456e-08  
a 5.211984288629483 1.0832e-07 au
q 4.497431236753109 3.4362e-07 au
i 28.46178839312254 5.8965e-06 deg
node 76.01896557582413 1.1092e-05 deg
peri 351.9962661456855 2.4064e-05 deg
M 276.2651767783597 2.7141e-05 deg
tp 2460011.396471607111
(2023-Mar-07.89647161)
0.00034804 TDB
period 4346.13361295672
11.90
0.00013549
3.71e-07
d
yr
n .0828322440264528 2.5822e-09 deg/d
Q 5.926537340505857 1.2317e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1509  
   data-arc span      12195 days (33.39 yr)  
   first obs. used      1986-12-02  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51607  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:13:09  

Additional Information
 Earth MOID = 3.51391 au 
 Jupiter MOID = .577914 au 
 T_jup = 2.741 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456470.5 (2013-Jun-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1361687824406143 6.0917e-08  
q 4.508345304526047 3.4102e-07 au
tp 2455663.878650589541
(2011-Apr-12.37865059)
0.0002789 TDB
node 76.02751626814099 1.1082e-05 deg
peri 351.9973789154624 2.4288e-05 deg
i 28.46563248003291 5.8984e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1509  
   data-arc span      12195 days (33.39 yr)  
   first obs. used      1986-12-02  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51607  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:13:09  

Additional Information
 Jupiter MOID = .577914 au 
 T_jup = 2.741 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.710866378501629E-15 -1.994268418089756E-14 1.765842576482359E-12 5.789442423038929E-15 -2.785200421180519E-14 1.020969480137874E-15
q -1.994268418089756E-14 1.162935805032489E-13 -6.41774474665906E-14 -2.136218768138162E-14 1.03449304908337E-12 4.19356625077752E-15
tp 1.765842576482359E-12 -6.41774474665906E-14 7.778737103065027E-8 1.69675441956716E-11 6.047300145050244E-9 -3.059656081144223E-11
node 5.789442423038929E-15 -2.136218768138162E-14 1.69675441956716E-11 1.228213141036159E-10 -1.064446524277767E-10 -1.273599021347177E-11
peri -2.785200421180519E-14 1.03449304908337E-12 6.047300145050244E-9 -1.064446524277767E-10 5.899153865421033E-10 9.074501891935157E-12
i 1.020969480137874E-15 4.19356625077752E-15 -3.059656081144223E-11 -1.273599021347177E-11 9.074501891935157E-12 3.479117505698829E-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 9.1   n/a MPO421678  
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. 2019-August); 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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