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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09998886715042381 3.7896e-08  
a 2.412639512146908 1.0574e-08 au
q 2.171402420484987 9.1687e-08 au
i 6.46856640831225 3.917e-06 deg
node 279.6031612026276 4.0094e-05 deg
peri 33.7839209215033 4.5755e-05 deg
M 108.6943946361197 2.207e-05 deg
tp 2458187.222531787802
(2018-Mar-09.72253179)
8.3555e-05 TDB
period 1368.790810735618
3.75
8.9987e-06
2.464e-08
d
yr
n .2630058568310583 1.729e-09 deg/d
Q 2.653876603808828 1.1631e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1116  
   data-arc span      7605 days (20.82 yr)  
   first obs. used      1998-03-31  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52742  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:09:12  

Additional Information
 Earth MOID = 1.1595 au 
 Jupiter MOID = 2.55877 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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