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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1192168607290941 4.1963e-08  
a 2.691975651949942 1.5359e-08 au
q 2.371046765565313 1.1179e-07 au
i 10.4588083502066 5.1506e-06 deg
node 28.01343432096898 2.0436e-05 deg
peri 191.7691248727762 2.889e-05 deg
M 152.1288550362936 2.3496e-05 deg
tp 2458518.767161604834
(2019-Feb-04.26716160)
0.00010253 TDB
period 1613.262794646739
4.42
1.3806e-05
3.78e-08
d
yr
n .2231502525159456 1.9097e-09 deg/d
Q 3.01290453833457 1.719e-08 au
  Orbit Determination Parameters
   # obs. used (total)      815  
   data-arc span      9055 days (24.79 yr)  
   first obs. used      1996-03-23  
   last obs. used      2021-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49576  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:25:13  

Additional Information
 Earth MOID = 1.36367 au 
 Jupiter MOID = 1.95887 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. 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:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
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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