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20419 (1998 SE117)
Classification: Main-belt Asteroid          SPK-ID: 2020419
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .160077657302703 1.7166e-08  
a 2.396430350377354 7.4038e-09 au
q 2.012815393999852 4.16e-08 au
i 7.048296077295775 4.0584e-07 deg
node 231.6889687714283 5.8932e-06 deg
peri 277.3793619225102 7.0329e-06 deg
M 237.1065278125499 5.3543e-06 deg
tp 2459663.064136164082
(2022-Mar-24.56413616)
2.1732e-05 TDB
period 1355.019807439981
3.71
6.2795e-06
1.719e-08
d
yr
n .2656787731244628 1.2312e-09 deg/d
Q 2.780045306754857 8.589e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2144  
   data-arc span      13171 days (36.06 yr)  
   first obs. used      1985-01-21  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48622  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:20:12  

Additional Information
 Earth MOID = 1.03803 au 
 Jupiter MOID = 2.27409 au 
 T_jup = 3.501 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.79   n/a E2021B10  
diameter diameter 4.521 km 0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.500 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.]
geometric albedo albedo 0.286   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20419 (1998 SE117)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SE117 = 1985 FD2 = 2000 AS130 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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