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JPL Small-Body Database Browser
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20255 (1998 FX2)
Classification: Amor [NEO]          SPK-ID: 2020255
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4906753438082804 2.7767e-08  
a 2.152723285467912 4.5842e-09 au
q 1.096435047246854 5.9911e-08 au
i 9.945680600277418 7.033e-06 deg
node 180.9683732246056 1.1913e-05 deg
peri 17.58441653594932 2.2651e-05 deg
M 240.2281217048133 1.1567e-05 deg
tp 2458984.324859112829
(2020-May-14.82485911)
3.8222e-05 TDB
period 1153.66771605661
3.16
3.6851e-06
1.009e-08
d
yr
n .312048257041055 9.9676e-10 deg/d
Q 3.209011523688972 6.8336e-09 au
  Orbit Determination Parameters
   # obs. used (total)      620  
   data-arc span      7982 days (21.85 yr)  
   first obs. used      1998-03-20  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54569  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-27 05:41:01  

Additional Information
 Earth MOID = .105396 au 
 Jupiter MOID = 1.75124 au 
 T_jup = 3.521 
[ 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 18.2   n/a PDS3 (MPO 7774)  
rotation period rot_per 6.804 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
[Krugly, Yu.N.; Bel'skaya, I.N.; Shevchenko, V.G.; et al. (2002) Icarus 158, 294-304.]
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

20255 (1998 FX2)          Discovered 1998-Mar-22 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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