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JPL Small-Body Database Browser
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13538 (1991 ST)
Classification: Main-belt Asteroid          SPK-ID: 2013538
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2201265743115258 3.8619e-08  
a 2.200712845421835 6.2282e-09 au
q 1.716277465715757 8.5173e-08 au
i 6.84998505817178 3.4124e-06 deg
node 79.51732746491642 3.0531e-05 deg
peri 229.3466617974033 3.1367e-05 deg
M 188.9448901808452 8.6561e-06 deg
tp 2459167.100620546765
(2020-Nov-13.60062055)
2.9772e-05 TDB
period 1192.459106380896
3.26
5.0621e-06
1.386e-08
d
yr
n .301897145213304 1.2816e-09 deg/d
Q 2.685148225127914 7.5991e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2269  
   data-arc span      24279 days (66.47 yr)  
   first obs. used      1952-11-12  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48704  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:10:21  

Additional Information
 Earth MOID = .710077 au 
 Jupiter MOID = 2.58204 au 
 T_jup = 3.624 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO381372  
diameter diameter 4.762 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.3206 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Ditteon, R.; Trent, L. (2018) Minor Planet Bull. 45, 328-329.]
[Radford, D. (2018) Minor Planet Bull. 45, 2.]
geometric albedo albedo 0.340   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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