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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1549473186763394 3.6234e-08  
a 3.200346653852259 2.0215e-08 au
q 2.704461521003056 1.1601e-07 au
i 1.555373073983944 4.911e-06 deg
node 54.77548888185028 0.00015836 deg
peri 52.63042416724259 0.00015923 deg
M 54.70526896989877 1.7186e-05 deg
tp 2458882.724348573058
(2020-Feb-03.22434857)
9.8581e-05 TDB
period 2091.192250176974
5.73
1.9814e-05
5.425e-08
d
yr
n .1721505997210605 1.6311e-09 deg/d
Q 3.696231786701461 2.3348e-08 au
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      8402 days (23.00 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53862  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:07:03  

Additional Information
 Earth MOID = 1.72148 au 
 Jupiter MOID = 1.43659 au 
 T_jup = 3.175 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456681.5 (2014-Jan-24.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1557983293667033 3.6237e-08  
q 2.702405972427412 1.1625e-07 au
tp 2456798.033037007310
(2014-May-20.53303701)
9.2005e-05 TDB
node 54.85289558726724 0.00015813 deg
peri 53.6958613737973 0.000159 deg
i 1.556561865255631 4.9131e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      8402 days (23.00 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53862  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:07:03  

Additional Information
 Jupiter MOID = 1.43659 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.313119655431665E-15 -4.168691422435685E-15 -2.913185735195352E-13 -3.986947512683396E-16 -5.651144678893096E-14 -7.217245962545074E-17
q -4.168691422435685E-15 1.351421612210277E-14 1.193911977120248E-12 2.068025412525774E-15 2.216801914552116E-13 2.653867485100458E-16
tp -2.913185735195352E-13 1.193911977120248E-12 8.46488808222202E-9 -3.140475625757852E-13 1.547961283693446E-9 -4.71769431947266E-13
node -3.986947512683396E-16 2.068025412525774E-15 -3.140475625757852E-13 2.500582508392407E-8 -2.499610805110026E-8 -9.918195039241585E-11
peri -5.651144678893096E-14 2.216801914552116E-13 1.547961283693446E-9 -2.499610805110026E-8 2.528027027103422E-8 9.905443675423546E-11
i -7.217245962545074E-17 2.653867485100458E-16 -4.71769431947266E-13 -9.918195039241585E-11 9.905443675423546E-11 2.413882876545379E-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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