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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02296672699579209 5.573e-08  
a 5.294995973979563 1.0346e-07 au
q 5.173387247001356 3.5461e-07 au
i 28.75066221847694 5.8937e-06 deg
node 120.5547829422006 1.1279e-05 deg
peri 281.5024543754478 0.00013776 deg
M 303.8609948088372 0.00013973 deg
tp 2459694.499391904386
(2022-Apr-24.99939190)
0.0017298 TDB
period 4450.377776286423
12.18
0.00013043
3.571e-07
d
yr
n .08089200919486855 2.3708e-09 deg/d
Q 5.41660470095777 1.0584e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1815  
   data-arc span      25083 days (68.67 yr)  
   first obs. used      1951-11-28  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:59:24  

Additional Information
 Earth MOID = 4.2626 au 
 Jupiter MOID = .00857414 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 9.6   n/a MPO365437  
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. 2019-August); 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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