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120842 (1998 KD55)
Classification: Main-belt Asteroid          SPK-ID: 2120842
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2323585590616876 4.6548e-08  
a 2.554738057534451 1.1591e-08 au
q 1.961122803705691 1.2246e-07 au
i 5.594492961613137 5.7455e-06 deg
node 140.8140553960743 5.4283e-05 deg
peri 96.99250894107468 5.7613e-05 deg
M 146.1657896004076 2.1461e-05 deg
tp 2458394.934353822968
(2018-Oct-03.43435382)
8.5866e-05 TDB
period 1491.481920767618
4.08
1.015e-05
2.779e-08
d
yr
n .24137067636376 1.6426e-09 deg/d
Q 3.148353311363211 1.4284e-08 au
  Orbit Determination Parameters
   # obs. used (total)      665  
   data-arc span      8192 days (22.43 yr)  
   first obs. used      1998-05-23  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57365  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:20  

Additional Information
 Earth MOID = .958835 au 
 Jupiter MOID = 1.88774 au 
 T_jup = 3.393 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457089.5 (2015-Mar-08.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2318699252962339 4.6553e-08  
q 1.9629952356155 1.2241e-07 au
tp 2456903.389609871742
(2014-Sep-02.88960987)
7.932e-05 TDB
node 140.8495703379054 5.4284e-05 deg
peri 97.05144121865935 5.7644e-05 deg
i 5.593896633890163 5.7463e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      665  
   data-arc span      8192 days (22.43 yr)  
   first obs. used      1998-05-23  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57365  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:20  

Additional Information
 Jupiter MOID = 1.88774 au 
 T_jup = 3.393 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.167192899824353E-15 -5.685504708603634E-15 -2.522453584783055E-12 -2.329690741636212E-14 -6.099228392868292E-13 -8.971141922512571E-15
q -5.685504708603634E-15 1.498391594155673E-14 6.90369112812746E-12 6.40524591732673E-14 1.666847808833917E-12 2.421328490954448E-14
tp -2.522453584783055E-12 6.90369112812746E-12 6.291700045120399E-9 3.123721189152529E-11 1.578563886450302E-9 1.501947156772895E-11
node -2.329690741636212E-14 6.40524591732673E-14 3.123721189152529E-11 2.946790922318239E-9 -2.923601252730465E-9 1.84101819224071E-10
peri -6.099228392868292E-13 1.666847808833917E-12 1.578563886450302E-9 -2.923601252730465E-9 3.322869105673671E-9 -1.793646634175363E-10
i -8.971141922512571E-15 2.421328490954448E-14 1.501947156772895E-11 1.84101819224071E-10 -1.793646634175363E-10 3.302043244175988E-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 15.7   n/a MPO449702  
diameter diameter 1.677 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.362   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120842 (1998 KD55)          Discovered 1998-May-23 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 KD55 = 2002 HS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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