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129728 (1998 WT9)
Classification: Main-belt Asteroid          SPK-ID: 2129728
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .193554751406928 6.9655e-08  
a 2.634356663207983 1.3829e-08 au
q 2.124464414143577 1.8488e-07 au
i 18.20402664755654 7.5502e-06 deg
node 14.42873702922496 1.4557e-05 deg
peri 358.7906953788702 2.1901e-05 deg
M 37.97398133347173 1.3421e-05 deg
tp 2458835.761950850158
(2019-Dec-18.26195085)
5.7928e-05 TDB
period 1561.745585040064
4.28
1.2297e-05
3.367e-08
d
yr
n .2305112967492493 1.815e-09 deg/d
Q 3.144248912272388 1.6505e-08 au
  Orbit Determination Parameters
   # obs. used (total)      595  
   data-arc span      7755 days (21.23 yr)  
   first obs. used      1998-11-01  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:05:38  

Additional Information
 Earth MOID = 1.12532 au 
 Jupiter MOID = 2.31924 au 
 T_jup = 3.301 
[ 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 15.3   n/a MPO493742  
diameter diameter 4.594 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.092   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129728 (1998 WT9)          Discovered 1998-Nov-16 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

Alternate Designations
 1998 WT9 = 2002 TF126 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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