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13538 (1991 ST)
Classification: Main-belt Asteroid          SPK-ID: 2013538
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .219972415968065 4.9499e-08  
a 2.201565358490474 8.8337e-09 au
q 1.717281707671725 1.0749e-07 au
i 6.848190600811938 4.2789e-06 deg
node 79.54273585404661 4.0844e-05 deg
peri 229.2130010071226 4.2646e-05 deg
M 247.2497892545509 1.5601e-05 deg
tp 2457974.189300196542
(2017-Aug-08.68930020)
5.3099e-05 JED
period 1193.152076446872
3.27
7.1812e-06
1.966e-08
d
yr
n .3017218065546651 1.816e-09 deg/d
Q 2.685849009309223 1.0777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1677  
   data-arc span      23147 days (63.37 yr)  
   first obs. used      1952-11-12  
   last obs. used      2016-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51556  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:16:47  

Additional Information
 Earth MOID = .711372 au 
 Jupiter MOID = 2.57331 au 
 T_jup = 3.623 
[ 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 13.6 mag n/a MPO358762  

13538 (1991 ST)          Discovered 1991-Sep-30 by McNaught, R. H. at Siding Spring
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 ST = 1952 VD = 1978 SB1 = 1978 TL9 = 1994 LF8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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