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18319 (1981 QS2)
Classification: Main-belt Asteroid          SPK-ID: 2018319
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .189636355284973 3.1547e-08  
a 2.397910283960607 7.8843e-09 au
q 1.943179317409962 7.4631e-08 au
i 2.807588879631134 3.8771e-06 deg
node 130.1584435530927 6.6281e-05 deg
peri 271.2300819803035 6.7118e-05 deg
M 158.8742237919529 1.1272e-05 deg
tp 2458601.952304230084
(2019-Apr-28.45230423)
4.1248e-05 TDB
period 1356.275205217297
3.71
6.6891e-06
1.831e-08
d
yr
n .2654328550836571 1.3091e-09 deg/d
Q 2.852641250511251 9.3794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1560  
   data-arc span      14417 days (39.47 yr)  
   first obs. used      1981-08-23  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54625  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:28  

Additional Information
 Earth MOID = .95296 au 
 Jupiter MOID = 2.55698 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 14.71   n/a E2021B10  

18319 (1981 QS2)          Discovered 1981-Aug-23 by Debehogne, H. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 QS2 = 1996 TK38 = 1998 FY30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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