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JPL Small-Body Database Browser
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58998 (1998 SK21)
Classification: Main-belt Asteroid          SPK-ID: 2058998
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1614679844468123 3.9999e-08  
a 2.749206986262303 1.8125e-08 au
q 2.305298075363434 1.1329e-07 au
i 13.01794505428843 5.895e-06 deg
node 187.9070176504097 1.983e-05 deg
peri 91.28750285918116 2.8779e-05 deg
M 259.9312992712828 2.3188e-05 deg
tp 2459063.312782645549
(2020-Aug-01.81278265)
0.00010931 TDB
period 1664.982162645228
4.56
1.6465e-05
4.508e-08
d
yr
n .2162185325925971 2.1382e-09 deg/d
Q 3.193115897161173 2.1051e-08 au
  Orbit Determination Parameters
   # obs. used (total)      623  
   data-arc span      8051 days (22.04 yr)  
   first obs. used      1997-04-13  
   last obs. used      2019-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60276  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:37:08  

Additional Information
 Earth MOID = 1.33416 au 
 Jupiter MOID = 2.06586 au 
 T_jup = 3.290 
[ 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 14.9   n/a MPO468491  

58998 (1998 SK21)          Discovered 1998-Sep-21 by Spacewatch at Kitt Peak
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SK21 = 2001 FZ37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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