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17979 (1999 JS55)
Classification: Main-belt Asteroid          SPK-ID: 2017979
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1357063446664544 3.0013e-08  
a 2.785830657950416 1.2595e-08 au
q 2.407775762500222 8.2533e-08 au
i 10.2163341750143 3.5832e-06 deg
node 86.70291607344083 1.8677e-05 deg
peri 215.5240127355315 2.2969e-05 deg
M 182.1671412679528 1.4297e-05 deg
tp 2460039.457587802438
(2023-Apr-04.95758780)
6.9294e-05 TDB
period 1698.362910894655
4.65
1.1517e-05
3.153e-08
d
yr
n .211968830507704 1.4375e-09 deg/d
Q 3.163885553400611 1.4304e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2137  
   data-arc span      11277 days (30.87 yr)  
   first obs. used      1990-04-29  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46064  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:18:49  

Additional Information
 Earth MOID = 1.39817 au 
 Jupiter MOID = 2.04795 au 
 T_jup = 3.295 
[ 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 13.49   n/a E2021B10  

17979 (1999 JS55)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JS55 = 1990 HA7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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