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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 
[ show covariance matrix ]

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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