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18319 (1981 QS2)
Classification: Main-belt Asteroid          SPK-ID: 2018319
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18811385407545 5.7588e-08  
a 2.398670756911442 1.3498e-08 au
q 1.947447556170754 1.3842e-07 au
i 2.807871847491537 5.0319e-06 deg
node 130.2304898655945 0.00012725 deg
peri 270.810041252178 0.00012807 deg
M 41.81737719918873 1.3899e-05 deg
tp 2457242.880960339837
(2015-Aug-08.38096034)
5.2051e-05 JED
period 1356.920449777981
3.72
1.1454e-05
3.136e-08
d
yr
n .2653066361103947 2.2395e-09 deg/d
Q 2.849893957652129 1.6038e-08 au
  Orbit Determination Parameters
   # obs. used (total)      976  
   data-arc span      12534 days (34.32 yr)  
   first obs. used      1981-08-23  
   last obs. used      2015-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52287  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:39:27  

Additional Information
 Earth MOID = .956779 au 
 Jupiter MOID = 2.56241 au 
 T_jup = 3.501 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7 mag n/a MPO350948  

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 | Physical Parameters | Discovery Circumstances ]
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