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JPL Small-Body Database Browser
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17978 (1999 JS54)
Classification: Main-belt Asteroid          SPK-ID: 2017978
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595022376368901 3.3765e-08  
a 2.275168179231731 6.5634e-09 au
q 1.912273763644021 7.6881e-08 au
i 4.173664098957798 3.5741e-06 deg
node 293.7332331211051 5.2668e-05 deg
peri 226.7561037723921 5.4013e-05 deg
M 353.3848490236651 1.141e-05 deg
tp 2458623.533288327025
(2019-May-20.03328833)
3.9741e-05 TDB
period 1253.483681233108
3.43
5.424e-06
1.485e-08
d
yr
n .2871995905410209 1.2428e-09 deg/d
Q 2.638062594819441 7.6102e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1607  
   data-arc span      8887 days (24.33 yr)  
   first obs. used      1995-01-07  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51251  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:33:55  

Additional Information
 Earth MOID = .924456 au 
 Jupiter MOID = 2.36101 au 
 T_jup = 3.589 
[ 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 14.8   n/a MPO474005  

17978 (1999 JS54)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JS54 = 1997 WU19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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