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85601 (1998 FU121)
Classification: Outer Main-belt Asteroid          SPK-ID: 2085601
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1549473188906403 3.6272e-08  
a 3.200346653729683 2.024e-08 au
q 2.704461520213636 1.1617e-07 au
i 1.555373043681623 4.9134e-06 deg
node 54.77548778849947 0.00015845 deg
peri 52.63042526898986 0.00015933 deg
M 54.70526900198696 1.7189e-05 deg
tp 2458882.724348404918
(2020-Feb-03.22434840)
9.8595e-05 TDB
period 2091.192250056832
5.73
1.9838e-05
5.431e-08
d
yr
n .1721505997309508 1.6331e-09 deg/d
Q 3.69623178724573 2.3376e-08 au
  Orbit Determination Parameters
   # obs. used (total)      973  
   data-arc span      8396 days (22.99 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53933  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:13:49  

Additional Information
 Earth MOID = 1.72148 au 
 Jupiter MOID = 1.43659 au 
 T_jup = 3.175 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456678.5 (2014-Jan-21.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1557895984963811 3.6276e-08  
q 2.70239979804509 1.1641e-07 au
tp 2456798.044849292486
(2014-May-20.54484929)
9.2012e-05 TDB
node 54.85310491197563 0.00015823 deg
peri 53.69838682285513 0.00015909 deg
i 1.556573637098078 4.9156e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      973  
   data-arc span      8396 days (22.99 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53933  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:13:49  

Additional Information
 Jupiter MOID = 1.43659 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.315933727888458E-15 -4.17893465268653E-15 -2.927334124372269E-13 -4.199941610371968E-16 -5.651365606717464E-14 -7.280124696665124E-17
q -4.17893465268653E-15 1.355165696968972E-14 1.199185114687789E-12 2.110900232071561E-15 2.217251909623622E-13 2.695389331079271E-16
tp -2.927334124372269E-13 1.199185114687789E-12 8.466209009575262E-9 -1.492488441327639E-13 1.54793768584561E-9 -4.680946901161146E-13
node -4.199941610371968E-16 2.110900232071561E-15 -1.492488441327639E-13 2.503664749859719E-8 -2.502688759096217E-8 -9.831451520462863E-11
peri -5.651365606717464E-14 2.217251909623622E-13 1.54793768584561E-9 -2.502688759096217E-8 2.531103564363012E-8 9.81879189879485E-11
i -7.280124696665124E-17 2.695389331079271E-16 -4.680946901161146E-13 -9.831451520462863E-11 9.81879189879485E-11 2.416331139158464E-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 14.61   n/a E2021B10  
diameter diameter 6.716 km 0.305 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.039   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85601 (1998 FU121)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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