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129602 (1997 WA12)
Classification: Jupiter Trojan          SPK-ID: 2129602
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03202683302275963 5.3039e-08  
a 5.286029083237195 1.2184e-07 au
q 5.116734312434906 2.9487e-07 au
i 16.61704540093512 6.5418e-06 deg
node 225.4103506426499 2.2192e-05 deg
peri 78.31754922788568 0.00013134 deg
M 59.17453823854043 0.00012531 deg
tp 2458270.832292871136
(2018-Jun-01.33229287)
0.0015567 TDB
period 4439.077724738493
12.15
0.00015348
4.202e-07
d
yr
n .08109792671431715 2.8039e-09 deg/d
Q 5.455323854039483 1.2574e-07 au
  Orbit Determination Parameters
   # obs. used (total)      649  
   data-arc span      8363 days (22.90 yr)  
   first obs. used      1997-10-29  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5264  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 20:28:59  

Additional Information
 Earth MOID = 4.1476 au 
 Jupiter MOID = .173404 au 
 T_jup = 2.915 
[ 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 12.1   n/a MPO417676  
diameter diameter 15.739 km 0.961 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
rotation period rot_per 43.010 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:
[Ryan, E.L.; Sharkey, B.N.L.; Woodward, C.E. (2017) Astron. J. 153, A116.]
[Szabo, Gy.M.; Pal, A.; Kiss, Cs.; Kiss, L.L.; et al. (2017) Astron. Astrophys. 599, A44.]
geometric albedo albedo 0.113   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

129602 (1997 WA12)          Discovered 1997-Nov-22 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

Alternate Designations
 1997 WA12 = 2004 JL30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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