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464798 (2004 JX20)
Classification: Aten [NEO]          SPK-ID: 2464798
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 118 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2657634061323458 7.007e-08  
a .9015614315355422 1.4636e-09 au
q .6619593946531029 6.3461e-08 au
i 10.53086048017075 1.2642e-05 deg
node 101.7884039303332 3.4065e-05 deg
peri 349.1208829105168 3.1508e-05 deg
M 254.020459550596 4.5651e-05 deg
tp 2459292.547276861446
(2021-Mar-19.04727686)
3.9695e-05 TDB
period 312.6737437207571
0.86
7.6141e-07
2.085e-09
d
yr
n 1.151359867048859 2.8037e-09 deg/d
Q 1.141163468417982 1.8526e-09 au
  Orbit Determination Parameters
   # obs. used (total)      722  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      4452 days (12.19 yr)  
   first obs. used      2004-05-15  
   last obs. used      2016-07-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36396  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:02:45  

Additional Information
 Earth MOID = .0944487 au 
 Jupiter MOID = 4.01399 au 
 T_jup = 6.561 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455868.5 (2011-Nov-03.0) TDB
Reference: JPL 118 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2659909762654643 6.9801e-08  
q .6619236301383308 6.3269e-08 au
tp 2455852.181087403130
(2011-Oct-17.68108740)
3.7277e-05 TDB
node 101.891176610682 3.4222e-05 deg
peri 349.0684769875919 3.1697e-05 deg
i 10.52078147975179 1.2647e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      722  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      4452 days (12.19 yr)  
   first obs. used      2004-05-15  
   last obs. used      2016-07-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36396  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:02:45  

Additional Information
 Jupiter MOID = 4.01399 au 
 T_jup = 6.561 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.872176727962455E-15 -4.415536387000501E-15 2.382808355111008E-12 4.35645678711197E-13 1.161495871268186E-12 -3.293643572553934E-13
q -4.415536387000501E-15 4.002966857574104E-15 -2.149806227511765E-12 -3.657884681771448E-13 -1.071567228482911E-12 2.87026639178304E-13
tp 2.382808355111008E-12 -2.149806227511765E-12 1.389601968377872E-9 4.608522514914426E-10 4.97260243331091E-10 -2.470483654757573E-10
node 4.35645678711197E-13 -3.657884681771448E-13 4.608522514914426E-10 1.171146816446804E-9 -7.516164334892549E-10 -4.002232755755854E-10
peri 1.161495871268186E-12 -1.071567228482911E-12 4.97260243331091E-10 -7.516164334892549E-10 1.004690433194165E-9 1.975298945834955E-10
i -3.293643572553934E-13 2.87026639178304E-13 -2.470483654757573E-10 -4.002232755755854E-10 1.975298945834955E-10 1.599475208555483E-10

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 19.4   n/a MPO198885  
diameter diameter 1.109 km 0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 10.758 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Skiff, B.A. (2019) Posting on CALL web site: http://www.minorplanet.info/call.html]
geometric albedo albedo 0.028   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

464798 (2004 JX20)          Discovered 2004-May-15 by CSS at Catalina
Reference: Last Updated: 2016-04-25

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