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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1586978036038239 3.0767e-08  
a 2.398361188305799 8.522e-09 au
q 2.017746535473012 7.3262e-08 au
i 7.051167185722744 4.1753e-06 deg
node 231.7461333188742 2.8016e-05 deg
peri 277.3454847647919 3.1052e-05 deg
M 77.83752044445606 1.3792e-05 deg
tp 2458307.169785222788
(2018-Jul-07.66978522)
5.1558e-05 TDB
period 1356.657775283971
3.71
7.2309e-06
1.98e-08
d
yr
n .2653580044714269 1.4143e-09 deg/d
Q 2.778975841138587 9.8745e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1627  
   data-arc span      12643 days (34.61 yr)  
   first obs. used      1985-01-21  
   last obs. used      2019-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52054  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:29:52  

Additional Information
 Earth MOID = 1.04355 au 
 Jupiter MOID = 2.27728 au 
 T_jup = 3.500 
[ 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 13.7   n/a MPO492967  
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. 2019-January); 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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