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18054 (1999 SW7)
Classification: Jupiter Trojan          SPK-ID: 2018054
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01853027005763291 5.1897e-08  
a 5.23918998608551 8.7307e-08 au
q 5.1421063807601 3.0311e-07 au
i 19.67410825024144 4.02e-06 deg
node 124.8129784200524 1.3156e-05 deg
peri 127.7429350707592 0.00013105 deg
M 26.36349541605236 0.00012656 deg
tp 2459075.728970511340
(2020-Aug-14.22897051)
0.0015444 TDB
period 4380.207130864935
11.99
0.00010949
2.998e-07
d
yr
n .08218789414392667 2.0544e-09 deg/d
Q 5.33627359141092 8.8925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2256  
   data-arc span      23935 days (65.53 yr)  
   first obs. used      1955-12-16  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40911  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:32:59  

Additional Information
 Earth MOID = 4.14823 au 
 Jupiter MOID = .00439591 au 
 T_jup = 2.883 
[ 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 10.76   n/a E2021B10  
diameter diameter 36.222 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.071   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

18054 (1999 SW7)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SW7 = 1991 XT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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