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85809 (1998 WU12)
Classification: Main-belt Asteroid          SPK-ID: 2085809
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .210049586867768 4.9234e-08  
a 2.757455085024931 2.0356e-08 au
q 2.178252783609018 1.3764e-07 au
i 9.727172512623429 6.1451e-06 deg
node 35.62312736430982 2.7154e-05 deg
peri 310.3995656997872 3.0215e-05 deg
M 301.7866370309847 1.6547e-05 deg
tp 2459270.946450504955
(2021-Feb-25.44645050)
7.8615e-05 TDB
period 1672.48063358932
4.58
1.852e-05
5.07e-08
d
yr
n .2152491292095874 2.3835e-09 deg/d
Q 3.336657386440844 2.4632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      7482 days (20.48 yr)  
   first obs. used      1998-11-11  
   last obs. used      2019-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54682  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:56:03  

Additional Information
 Earth MOID = 1.18686 au 
 Jupiter MOID = 2.14644 au 
 T_jup = 3.290 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456959.5 (2014-Oct-29.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2098007252703669 4.9296e-08  
q 2.177447576154613 1.3748e-07 au
tp 2457601.997736145318
(2016-Aug-01.49773615)
6.9121e-05 TDB
node 35.64580710816469 2.7135e-05 deg
peri 310.8791650206547 3.0186e-05 deg
i 9.732440799000138 6.1481e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      7482 days (20.48 yr)  
   first obs. used      1998-11-11  
   last obs. used      2019-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54682  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:56:03  

Additional Information
 Jupiter MOID = 2.14644 au 
 T_jup = 3.290 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.430132016077746E-15 -6.73008904767926E-15 1.019607707082147E-12 -7.092731373896002E-15 2.163784409389882E-13 1.991497593456386E-15
q -6.73008904767926E-15 1.890163796035342E-14 -2.364176522607955E-12 1.78080588283498E-14 -5.36591124354947E-13 -4.875100791375823E-15
tp 1.019607707082147E-12 -2.364176522607955E-12 4.777703738261538E-9 -1.031626493967869E-11 9.266483910033264E-10 -4.080990955834608E-12
node -7.092731373896002E-15 1.78080588283498E-14 -1.031626493967869E-11 7.362965365232325E-10 -7.270385091813624E-10 -1.172841937981683E-11
peri 2.163784409389882E-13 -5.36591124354947E-13 9.266483910033264E-10 -7.270385091813624E-10 9.111726801316375E-10 1.073777393966017E-11
i 1.991497593456386E-15 -4.875100791375823E-15 -4.080990955834608E-12 -1.172841937981683E-11 1.073777393966017E-11 3.779867038121721E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9   n/a MPO436375  
diameter diameter 5.925 km 0.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85809 (1998 WU12)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 WU12 = 2003 YE150 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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