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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1882958314085831 6.3396e-08  
a 2.399105459436566 1.5543e-08 AU
q 1.947363902315087 1.5509e-07 AU
i 2.807870491439663 5.3218e-06 deg
node 130.2302551702167 0.00013669 deg
peri 270.7855855835448 0.00013745 deg
M 295.7303658032054 1.5313e-05 deg
tp 2457242.812468941033
(2015-Aug-08.31246894)
5.8675e-05 JED
period 1357.289331251905
3.72
1.319e-05
3.611e-08
d
yr
n .2652345315850612 2.5776e-09 deg/d
Q 2.850847016558045 1.847e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      868  
   data-arc span      12002 days (32.86 yr)  
   first obs. used      1981-08-23  
   last obs. used      2014-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53368  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:40:40  

Additional Information
 Earth MOID = .95771 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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