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15440 (1998 WX4)
Classification: Jupiter Trojan          SPK-ID: 2015440
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 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0231317016527951 2.6953e-08  
a 5.294185266939039 8.9974e-08 au
q 5.171721752849582 2.0685e-07 au
i 28.75099787297657 5.2949e-07 deg
node 120.5557061971232 4.8218e-06 deg
peri 282.3590632522148 7.3681e-05 deg
M 319.2236192766677 7.6922e-05 deg
tp 2459704.468398030948
(2022-May-04.96839803)
0.00095274 TDB
period 4449.355731744173
12.18
0.00011342
3.105e-07
d
yr
n .08091059058990502 2.0626e-09 deg/d
Q 5.416648781028496 9.2056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2078  
   data-arc span      25251 days (69.13 yr)  
   first obs. used      1951-11-28  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42535  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:58:38  

Additional Information
 Earth MOID = 4.25964 au 
 Jupiter MOID = .011275 au 
 T_jup = 2.751 
[ 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 9.64   n/a E2021B10  
diameter diameter 62.519 km 0.831 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 21.43 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Stephens, R.D. Warner, B.D. (2017) Minor Planet Bull. 44, 312-316.]
geometric albedo albedo 0.072   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

15440 (1998 WX4)          Discovered 1998-Nov-19 by CSS at Catalina
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 WX4 = 1992 LD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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