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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1881409927375138 5.453e-08  
a 2.399450214704538 1.2429e-08 au
q 1.948015269285786 1.2959e-07 au
i 2.807702779953264 4.8913e-06 deg
node 130.2294997700491 0.00011554 deg
peri 270.9084969861138 0.00011644 deg
M 94.7695231078179 1.3113e-05 deg
tp 2457243.118360920542
(2015-Aug-08.61836092)
4.9013e-05 JED
period 1357.581908713768
3.72
1.0548e-05
2.888e-08
d
yr
n .2651773699172815 2.0604e-09 deg/d
Q 2.850885160123291 1.4767e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1009  
   data-arc span      12610 days (34.52 yr)  
   first obs. used      1981-08-23  
   last obs. used      2016-03-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52638  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:32:21  

Additional Information
 Earth MOID = .957202 au 
 Jupiter MOID = 2.55961 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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