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49346 (1998 WK4)
Classification: Main-belt Asteroid          SPK-ID: 2049346
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 .2382508698757753 5.4781e-08  
a 2.710939718816628 1.8431e-08 au
q 2.065055972627777 1.4918e-07 au
i 2.886645503670517 5.0946e-06 deg
node 73.3310114927753 0.00011561 deg
peri 308.2525611994942 0.00011602 deg
M 327.5552810957643 1.5789e-05 deg
tp 2459147.433130923434
(2020-Oct-24.93313092)
7.2611e-05 TDB
period 1630.340126803527
4.46
1.6627e-05
4.552e-08
d
yr
n .2208128194119973 2.2519e-09 deg/d
Q 3.356823465005479 2.2823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      574  
   data-arc span      7577 days (20.74 yr)  
   first obs. used      1998-11-21  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51939  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:16:25  

Additional Information
 Earth MOID = 1.06967 au 
 Jupiter MOID = 2.10258 au 
 T_jup = 3.320 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456638.5 (2013-Dec-12.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2422955978299606 5.5024e-08  
q 2.051483857226876 1.5032e-07 au
tp 2455889.462590631680
(2011-Nov-23.96259063)
5.1972e-05 TDB
node 73.34788753011806 0.00011557 deg
peri 308.2422480664874 0.00011596 deg
i 2.890558856821528 5.1053e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      574  
   data-arc span      7577 days (20.74 yr)  
   first obs. used      1998-11-21  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51939  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:16:25  

Additional Information
 Jupiter MOID = 2.10258 au 
 T_jup = 3.320 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.027605704758334E-15 -8.237520704507493E-15 -4.049875804636422E-13 1.092469602538543E-14 -8.652022717919197E-14 -3.504886258631961E-16
q -8.237520704507493E-15 2.259566714862049E-14 1.380113114129131E-12 -3.065975048853634E-14 2.998844616839468E-13 1.08135582905188E-15
tp -4.049875804636422E-13 1.380113114129131E-12 2.701063521683665E-9 6.930820795148525E-13 5.451416348094259E-10 1.62052203226691E-13
node 1.092469602538543E-14 -3.065975048853634E-14 6.930820795148525E-13 1.335625733933934E-8 -1.333888102366593E-8 -1.816505995366011E-10
peri -8.652022717919197E-14 2.998844616839468E-13 5.451416348094259E-10 -1.333888102366593E-8 1.344610059035454E-8 1.81466097261274E-10
i -3.504886258631961E-16 1.08135582905188E-15 1.62052203226691E-13 -1.816505995366011E-10 1.81466097261274E-10 2.606403665673728E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   n/a MPO432052  

49346 (1998 WK4)          Discovered 1998-Nov-21 by Comba, P. G. at Prescott
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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