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24279 (1999 XR171)
Classification: Jupiter Trojan          SPK-ID: 2024279
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07387835503153178 6.6153e-08  
a 5.176442114393667 1.4735e-07 au
q 4.794015086066318 4.5517e-07 au
i 10.75500198205426 5.7599e-06 deg
node 313.5501889998265 3.6565e-05 deg
peri 131.4362073171777 6.6743e-05 deg
M 302.4157835149142 5.7777e-05 deg
tp 2459888.591876920874
(2022-Nov-05.09187692)
0.00070501 TDB
period 4301.752994341279
11.78
0.00018367
5.029e-07
d
yr
n .08368681336970307 3.5732e-09 deg/d
Q 5.558869142721015 1.5823e-07 au
  Orbit Determination Parameters
   # obs. used (total)      698  
   data-arc span      8914 days (24.41 yr)  
   first obs. used      1996-09-16  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:38:58  

Additional Information
 Earth MOID = 3.82168 au 
 Jupiter MOID = .347574 au 
 T_jup = 2.960 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.07   n/a E2021B10  
diameter diameter 20.315 km 0.602 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.089   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

24279 (1999 XR171)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20010408/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XR171 = 1996 SP8 = 1998 XD28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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