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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2105887985674681 3.305e-08  
a 2.365827453247295 8.8263e-09 au
q 1.867610692250014 8.0744e-08 au
i 4.408177825279878 4.1498e-06 deg
node .3872800373252929 4.442e-05 deg
peri 264.8940168836997 4.5913e-05 deg
M 339.6287727250973 9.489e-06 deg
tp 2459075.712101037615
(2020-Aug-14.21210104)
3.4945e-05 TDB
period 1329.147037051591
3.64
7.4381e-06
2.036e-08
d
yr
n .2708503950011263 1.5157e-09 deg/d
Q 2.864044214244576 1.0685e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1007  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1998-03-02  
   last obs. used      2020-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51649  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:16  

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 15.73   n/a E2021B55  
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. 2020-October); 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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