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JPL Small-Body Database Browser
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39942 (1998 FH104)
Classification: Main-belt Asteroid          SPK-ID: 2039942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1002345792033062 3.7887e-08  
a 2.412238684732373 9.8627e-09 au
q 2.170448955230287 9.1651e-08 au
i 6.468830793814369 3.7992e-06 deg
node 279.6033778071796 3.5199e-05 deg
peri 33.85944599226765 3.9874e-05 deg
M 213.8099393534807 2.024e-05 deg
tp 2459556.204852620103
(2021-Dec-07.70485262)
7.8307e-05 TDB
period 1368.449715791264
3.75
8.3926e-06
2.298e-08
d
yr
n .2630714127422951 1.6134e-09 deg/d
Q 2.654028414234459 1.0851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1254  
   data-arc span      7981 days (21.85 yr)  
   first obs. used      1998-03-31  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51794  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:39:54  

Additional Information
 Earth MOID = 1.15938 au 
 Jupiter MOID = 2.56036 au 
 T_jup = 3.503 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456972.5 (2014-Nov-11.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010649107275249 3.7986e-08  
q 2.168321445718478 9.2e-08 au
tp 2456817.388636533269
(2014-Jun-08.88863653)
7.2064e-05 TDB
node 279.7159232265931 3.5191e-05 deg
peri 33.34709854848654 3.9775e-05 deg
i 6.469823935009171 3.8007e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1254  
   data-arc span      7981 days (21.85 yr)  
   first obs. used      1998-03-31  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51794  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:39:54  

Additional Information
 Jupiter MOID = 2.56036 au 
 T_jup = 3.503 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.442924088575584E-15 -3.47852842799407E-15 5.64683200351764E-13 3.875298957904912E-15 1.223642430768507E-13 -1.652085525989265E-15
q -3.47852842799407E-15 8.464023362193403E-15 -1.218143814054043E-12 -7.953908729568078E-15 -2.584462613076292E-13 4.153321362378596E-15
tp 5.64683200351764E-13 -1.218143814054043E-12 5.193181473961016E-9 5.149750099644113E-12 1.35225764535965E-9 -1.41134181541066E-12
node 3.875298957904912E-15 -7.953908729568078E-15 5.149750099644113E-12 1.238372782910876E-9 -1.228718586141744E-9 2.279321587841794E-11
peri 1.223642430768507E-13 -2.584462613076292E-13 1.35225764535965E-9 -1.228718586141744E-9 1.582019915437539E-9 -2.29996270059194E-11
i -1.652085525989265E-15 4.153321362378596E-15 -1.41134181541066E-12 2.279321587841794E-11 -2.29996270059194E-11 1.444519028046619E-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 14.8   n/a MPO309462  
diameter diameter 2.500 km 0.671 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.408   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39942 (1998 FH104)          Discovered 1998-Mar-31 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FH104 = 1999 RW144 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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