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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550087553119881 3.8837e-08  
a 3.200942506991649 2.1541e-08 au
q 2.704768393157639 1.2576e-07 au
i 1.555336041084435 5.1049e-06 deg
node 54.7808628866935 0.00016343 deg
peri 52.69648058080036 0.00016428 deg
M 20.21853956969199 1.721e-05 deg
tp 2458883.020383802204
(2020-Feb-03.52038380)		 9.9507e-05 TDB
period 2091.776296968759
5.73		 2.1115e-05
5.781e-08		 d
yr
n .1721025333931187 1.7373e-09 deg/d
Q 3.697116620825659 2.488e-08 au
   Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      8081 days (22.12 yr)  
   first obs. used      1998-03-20  
   last obs. used      2020-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:26  

Additional Information
 Earth MOID = 1.72192 au 
 Jupiter MOID = 1.43569 au 
 T_jup = 3.175 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456458.5 (2013-Jun-15.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1553184946112882 3.89e-08  
q 2.701874856767338 1.2588e-07 au
tp 2456798.810214190803
(2014-May-21.31021419)		 9.2703e-05 TDB
node 54.85497234459568 0.00016316 deg
peri 53.87041259093615 0.000164 deg
i 1.557112891806467 5.1093e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      8081 days (22.12 yr)  
   first obs. used      1998-03-20  
   last obs. used      2020-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:26  

Additional Information
 Jupiter MOID = 1.43569 au 
 T_jup = 3.175 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.513224881698861E-15 -4.846795386090654E-15 -4.247659546629187E-13 -2.139626850090413E-15 -7.257942507808184E-14 -1.384930661397122E-16
q -4.846795386090654E-15 1.584646773169531E-14 1.659180294303164E-12 6.102989902393831E-15 2.734995131134307E-13 5.643430702903809E-16
tp -4.247659546629187E-13 1.659180294303164E-12 8.593803866447805E-9 6.667818708261801E-12 1.562517811595786E-9 -2.801561113548612E-13
node -2.139626850090413E-15 6.102989902393831E-15 6.667818708261801E-12 2.662020848240736E-8 -2.660857547533257E-8 -4.382422598553755E-11
peri -7.257942507808184E-14 2.734995131134307E-13 1.562517811595786E-9 -2.660857547533257E-8 2.689583235914783E-8 4.374743766203942E-11
i -1.384930661397122E-16 5.643430702903809E-16 -2.801561113548612E-13 -4.382422598553755E-11 4.374743766203942E-11 2.61049680471449E-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 14.6   n/a MPO459396  
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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