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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1883806827170498 6.9415e-08  
a 2.39908390888633 1.1716e-08 AU
q 1.947142844234835 1.658e-07 AU
i 2.807750271582554 5.9477e-06 deg
node 130.2310097306459 0.00015046 deg
peri 270.7877061997505 0.00015144 deg
M 242.6900212766021 1.6371e-05 deg
tp 2457242.781769940128
(2015-Aug-08.28176994)
6.2452e-05 JED
period 1357.271043019025
3.72
9.9423e-06
2.722e-08
d
yr
n .2652381054260463 1.9429e-09 deg/d
Q 2.851024973537825 1.3923e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      856  
   data-arc span      11635 days (31.85 yr)  
   first obs. used      1981-08-23  
   last obs. used      2013-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58117  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 18:51:55  

Additional Information
 Earth MOID = .95655 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 14.6 mag n/a MPO266052  

18319 (1981 QS2)          Discovered 1981-Aug-23 by Debehogne, H. at La Silla (809)
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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