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468468 (2004 KH17)
Classification: Aten [NEO, PHA]          SPK-ID: 2468468
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4982879982520677 1.1432e-07  
a .7120981317056972 6.1726e-09 au
q .3572681790990282 7.9464e-08 au
i 22.12319416332542 3.4518e-05 deg
node 79.1468669284974 1.2075e-05 deg
peri 340.7008505803365 1.7321e-05 deg
M 39.87984403400229 4.8179e-05 deg
tp 2459176.185846913627
(2020-Nov-22.68584691)
2.9288e-05 TDB
period 219.4866936698975
0.60
2.8538e-06
7.813e-09
d
yr
n 1.640190546318179 2.1326e-08 deg/d
Q 1.066928084312366 9.2484e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -6.673076538999061E-14 8.519E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      213  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      5473 days (14.98 yr)  
   first obs. used      2004-05-29  
   last obs. used      2019-05-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40228  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:15:34  

Additional Information
 Earth MOID = .00482492 au 
 Jupiter MOID = 4.26248 au 
 T_jup = 7.901 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455449.5 (2010-Sep-10.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .49868723210146 1.1341e-07  
q .3568905608583856 8.0581e-08 au
tp 2455445.386948601799
(2010-Sep-05.88694860)
3.397e-05 TDB
node 79.18801664414431 1.2151e-05 deg
peri 340.6801389700852 1.7307e-05 deg
i 22.10855621835345 3.4551e-05 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -6.673076538999061E-14 8.519E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      213  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      5473 days (14.98 yr)  
   first obs. used      2004-05-29  
   last obs. used      2019-05-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40228  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:15:34  

Additional Information
 Jupiter MOID = 4.26248 au 
 T_jup = 7.901 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
Orbit Covariance (7×7)
  e q tp node peri i A2
e 1.286219167204779E-14 -9.138703836963156E-15 -3.549452965906736E-12 -6.222239456840767E-13 -1.286037387831272E-12 2.480780318095008E-12 6.284915134702899E-22
q -9.138703836963156E-15 6.493324479307622E-15 2.519948156729179E-12 4.405760132030073E-13 9.144133766338252E-13 -1.760391972508927E-12 -4.456347595789863E-22
tp -3.549452965906736E-12 2.519948156729179E-12 1.153992036047608E-9 1.902395526264734E-10 4.59474574992096E-10 -6.842745456438277E-10 -1.531974140098083E-19
node -6.222239456840767E-13 4.405760132030073E-13 1.902395526264734E-10 1.476488721781586E-10 -3.671532826782716E-11 -3.654089999868046E-10 -3.534245769724699E-20
peri -1.286037387831272E-12 9.144133766338252E-13 4.59474574992096E-10 -3.671532826782716E-11 2.99526617631759E-10 -4.814345646174183E-12 -3.413303712214034E-20
i 2.480780318095008E-12 -1.760391972508927E-12 -6.842745456438277E-10 -3.654089999868046E-10 -4.814345646174183E-12 1.193802262570467E-9 1.752497107193974E-19
A2 6.284915134702899E-22 -4.456347595789863E-22 -1.531974140098083E-19 -3.534245769724699E-20 -3.413303712214034E-20 1.752497107193974E-19 7.256577308625302E-29

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 21.9   n/a MPO264936  
diameter diameter 0.197 km 0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  
geometric albedo albedo 0.072   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  

468468 (2004 KH17)          Discovered 2004-May-29 by LINEAR at Socorro
Reference: Last Updated: 2016-06-21

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