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38598 (1999 XQ208)
Classification: Jupiter Trojan          SPK-ID: 2038598
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04963939262631725 5.2797e-08  
a 5.150411032125683 1.3663e-07 au
q 4.894747756715081 3.2621e-07 au
i 11.60671918593302 6.9146e-06 deg
node 44.26175873803372 3.1881e-05 deg
peri 64.59572322300448 9.6747e-05 deg
M 258.946227529603 9.5632e-05 deg
tp 2460198.926190146040
(2023-Sep-11.42619015)
0.0011612 TDB
period 4269.345101183234
11.69
0.00016988
4.651e-07
d
yr
n .08432206614082972 3.3552e-09 deg/d
Q 5.406074307536285 1.4341e-07 au
  Orbit Determination Parameters
   # obs. used (total)      416  
   data-arc span      10419 days (28.53 yr)  
   first obs. used      1991-04-15  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60589  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:46:22  

Additional Information
 Earth MOID = 3.93113 au 
 Jupiter MOID = .0711004 au 
 T_jup = 2.957 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456871.5 (2014-Aug-02.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05097293700567295 5.2834e-08  
q 4.878056979543554 3.2455e-07 au
tp 2455946.026485104137
(2012-Jan-19.52648510)
0.0010406 TDB
node 44.27455951629388 3.1864e-05 deg
peri 65.28484175822364 9.4536e-05 deg
i 11.61680087993886 6.9203e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      416  
   data-arc span      10419 days (28.53 yr)  
   first obs. used      1991-04-15  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60589  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:46:22  

Additional Information
 Jupiter MOID = .0711004 au 
 T_jup = 2.957 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.791479412329158E-15 -1.578647659413885E-14 8.23385583306702E-12 -1.3539152512937E-15 5.585710177656614E-13 -6.511312590565938E-16
q -1.578647659413885E-14 1.05334379825965E-13 2.028682782716548E-11 7.995502780639829E-15 2.858873579019294E-12 1.160159829473388E-14
tp 8.23385583306702E-12 2.028682782716548E-11 1.082774188016848E-6 -7.927637475046403E-11 9.266662896419569E-8 2.147658471273673E-11
node -1.3539152512937E-15 7.995502780639829E-15 -7.927637475046403E-11 1.015344797686449E-9 -1.000820421298216E-9 -8.971768439611615E-11
peri 5.585710177656614E-13 2.858873579019294E-12 9.266662896419569E-8 -1.000820421298216E-9 8.93702934691074E-9 8.991944055105786E-11
i -6.511312590565938E-16 1.160159829473388E-14 2.147658471273673E-11 -8.971768439611615E-11 8.991944055105786E-11 4.788988608459382E-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 12.4   n/a MPO439356  
diameter diameter 13.211 km 1.077 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.122   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

38598 (1999 XQ208)          Discovered 1999-Dec-13 by LINEAR at Socorro
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XQ208 = 1997 UL26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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