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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07359608961323277 6.7379e-08  
a 5.175082083470194 1.8566e-07 au
q 4.794216278699286 4.5656e-07 au
i 10.75510771242597 7.5818e-06 deg
node 313.5509603284113 3.7713e-05 deg
peri 131.5544549750219 7.7153e-05 deg
M 285.5314010716455 7.357e-05 deg
tp 2459889.997994154794
(2022-Nov-06.49799415)
0.00091159 TDB
period 4300.057776080971
11.77
0.0002314
6.335e-07
d
yr
n .08371980534831332 4.5052e-09 deg/d
Q 5.555947888241102 1.9932e-07 au
  Orbit Determination Parameters
   # obs. used (total)      423  
   data-arc span      8416 days (23.04 yr)  
   first obs. used      1996-09-16  
   last obs. used      2019-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60122  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:41:27  

Additional Information
 Earth MOID = 3.82212 au 
 Jupiter MOID = .345616 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 12.0   n/a MPO259513  
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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