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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1002345780217042 3.7874e-08  
a 2.412238683141874 9.7518e-09 au
q 2.170448956649517 9.1638e-08 au
i 6.468830745150684 3.7393e-06 deg
node 279.6033772049471 3.454e-05 deg
peri 33.85945129195839 3.9059e-05 deg
M 213.8099358339059 1.9967e-05 deg
tp 2459556.204865449281
(2021-Dec-07.70486545)
7.737e-05 TDB
period 1368.449714437842
3.75
8.2982e-06
2.272e-08
d
yr
n .2630714130024775 1.5953e-09 deg/d
Q 2.654028409634231 1.0729e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1331  
   data-arc span      8058 days (22.06 yr)  
   first obs. used      1998-03-31  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5142  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:47:31  

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

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