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JPL Small-Body Database Browser
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100784 (1998 FM61)
Classification: Main-belt Asteroid          SPK-ID: 2100784
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2105888001071058 3.3136e-08  
a 2.365827453992838 9.0198e-09 au
q 1.867610689196037 8.0862e-08 au
i 4.408180137931301 4.6617e-06 deg
node .3872720278479401 4.5237e-05 deg
peri 264.8940257255025 4.6734e-05 deg
M 339.628771363496 1.0144e-05 deg
tp 2459075.712106100302
(2020-Aug-14.21210610)
3.7402e-05 TDB
period 1329.147037679872
3.64
7.6011e-06
2.081e-08
d
yr
n .2708503948730966 1.5489e-09 deg/d
Q 2.86404421878964 1.0919e-08 au
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      8093 days (22.16 yr)  
   first obs. used      1998-03-02  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54329  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:56:07  

Additional Information
 Earth MOID = .858316 au 
 Jupiter MOID = 2.24482 au 
 T_jup = 3.514 
[ 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 15.7   n/a MPO366382  
diameter diameter 4.582 km 0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.301 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.053   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100784 (1998 FM61)          Discovered 1998-Mar-20 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 FM61 = 1999 TR174 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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