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39959 (1998 FH122)
Classification: Main-belt Asteroid          SPK-ID: 2039959
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04781698508745245 3.916e-08  
a 2.449006022853045 1.0529e-08 au
q 2.331901938379199 9.7295e-08 au
i 5.980704079226911 4.4174e-06 deg
node 209.0682676602031 3.7632e-05 deg
peri 18.77671636122864 5.9117e-05 deg
M 251.5536121448803 4.7788e-05 deg
tp 2459422.192422315880
(2021-Jul-26.69242232)
0.0001866 TDB
period 1399.855495754533
3.83
9.0275e-06
2.472e-08
d
yr
n .2571694014787985 1.6584e-09 deg/d
Q 2.56611010732689 1.1032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      882  
   data-arc span      9922 days (27.16 yr)  
   first obs. used      1992-11-19  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57623  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:22  

Additional Information
 Earth MOID = 1.32314 au 
 Jupiter MOID = 2.40547 au 
 T_jup = 3.488 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456892.5 (2014-Aug-23.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04817799557154238 3.8991e-08  
q 2.33096633506673 9.6878e-08 au
tp 2456626.557651575480
(2013-Nov-30.05765158)
0.00018183 TDB
node 209.0921981852066 3.7646e-05 deg
peri 19.73436857997865 5.9055e-05 deg
i 5.978873020244878 4.4172e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      882  
   data-arc span      9922 days (27.16 yr)  
   first obs. used      1992-11-19  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57623  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:22  

Additional Information
 Jupiter MOID = 2.40547 au 
 T_jup = 3.488 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.520284707999946E-15 -3.757353970646152E-15 -1.080024319591685E-12 -1.369854172321937E-14 -2.455088526037659E-13 5.412060761548283E-16
q -3.757353970646152E-15 9.385384519298227E-15 2.998655852679066E-12 3.306224777427794E-14 6.939048984823399E-13 -1.219611615027876E-15
tp -1.080024319591685E-12 2.998655852679066E-12 3.306035837347411E-8 3.624542608456833E-11 8.286163218619369E-9 -1.546129849719651E-12
node -1.369854172321937E-14 3.306224777427794E-14 3.624542608456833E-11 1.417227644345322E-9 -1.400214493680753E-9 1.753997136775593E-12
peri -2.455088526037659E-13 6.939048984823399E-13 8.286163218619369E-9 -1.400214493680753E-9 3.487467413010572E-9 -2.11799202411134E-12
i 5.412060761548283E-16 -1.219611615027876E-15 -1.546129849719651E-12 1.753997136775593E-12 -2.11799202411134E-12 1.951185213846497E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.3   n/a MPO449243  
diameter diameter 4.025 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39959 (1998 FH122)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FH122 = 1999 RT58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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