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100421 (1996 FF4)
Classification: Main-belt Asteroid          SPK-ID: 2100421
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1192018877956523 4.3168e-08  
a 2.692436036829236 1.6678e-08 au
q 2.371492578470146 1.1658e-07 au
i 10.45801056254589 5.2064e-06 deg
node 28.0163665827828 2.3004e-05 deg
peri 191.8723729344005 3.0829e-05 deg
M 107.3802267139714 2.3333e-05 deg
tp 2458519.175093924697
(2019-Feb-04.67509392)
0.00010266 TDB
period 1613.676665524898
4.42
1.4993e-05
4.105e-08
d
yr
n .2230930196185857 2.0729e-09 deg/d
Q 3.013379495188325 1.8666e-08 au
  Orbit Determination Parameters
   # obs. used (total)      719  
   data-arc span      8948 days (24.50 yr)  
   first obs. used      1996-03-23  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51138  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:35:58  

Additional Information
 Earth MOID = 1.36517 au 
 Jupiter MOID = 1.95968 au 
 T_jup = 3.337 
[ 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 15.1   n/a MPO436467  
diameter diameter 5.051 km 0.226 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.44 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:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]
geometric albedo albedo 0.076   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100421 (1996 FF4)          Discovered 1996-Mar-23 by AMOS at Haleakala
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1996 FF4 = 2001 FL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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