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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2208775804359888 5.1424e-08  
a 2.200314413714286 9.4735e-09 AU
q 1.714314289814644 1.1153e-07 AU
i 6.851091236270476 5.1883e-06 deg
node 79.5916211499455 4.5534e-05 deg
peri 229.1337280518273 4.7483e-05 deg
M 66.16666815482712 1.5679e-05 deg
tp 2456781.389945017101
(2014-May-03.88994502)
5.1258e-05 JED
period 1192.135284933326
3.26
7.6991e-06
2.108e-08
d
yr
n .3019791499755282 1.9503e-09 deg/d
Q 2.686314537613929 1.1566e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1399  
   data-arc span      22762 days (62.32 yr)  
   first obs. used      1952-11-12  
   last obs. used      2015-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50878  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:47:07  

Additional Information
 Earth MOID = .709845 AU 
 T_jup = 3.624 
[ 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 13.5 mag n/a MPO319253  

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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