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160661 (1999 XD225)
Classification: Jupiter Trojan          SPK-ID: 2160661
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08832436043149511 6.366e-08  
a 5.285674945341579 1.4501e-07 au
q 4.818821086345506 4.3644e-07 au
i 6.28209748777808 8.0301e-06 deg
node 301.6516257829779 6.4564e-05 deg
peri 118.3665245067615 8.4844e-05 deg
M 308.989189689923 5.6083e-05 deg
tp 2459829.439434744096
(2022-Sep-06.93943474)
0.00070031 TDB
period 4438.63163771673
12.15
0.00018266
5.001e-07
d
yr
n .08110607713894166 3.3377e-09 deg/d
Q 5.752528804337651 1.5782e-07 au
  Orbit Determination Parameters
   # obs. used (total)      280  
   data-arc span      8847 days (24.22 yr)  
   first obs. used      1996-09-16  
   last obs. used      2020-12-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53002  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:02:16  

Additional Information
 Earth MOID = 3.83671 au 
 Jupiter MOID = .249665 au 
 T_jup = 2.980 
[ 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 13.27   n/a E2021B55  
diameter diameter 13.088 km 0.703 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.049   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

160661 (1999 XD225)          Discovered 1999-Dec-13 by Spacewatch at Kitt Peak
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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