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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2203741414963981 3.6981e-08  
a 2.200635883538895 6.0335e-09 au
q 1.715672639957843 8.1755e-08 au
i 6.849863071715363 3.3517e-06 deg
node 79.51615549597705 3.0227e-05 deg
peri 229.3472837379788 3.1058e-05 deg
M 309.7326551543759 8.7622e-06 deg
tp 2459166.996135491293
(2020-Nov-13.49613549)
2.9342e-05 TDB
period 1192.396554083822
3.26
4.9038e-06
1.343e-08
d
yr
n .3019129825283721 1.2416e-09 deg/d
Q 2.685599127119946 7.3631e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2334  
   data-arc span      24554 days (67.23 yr)  
   first obs. used      1952-11-12  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49153  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:40:23  

Additional Information
 Earth MOID = .710239 au 
 Jupiter MOID = 2.58379 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-August); 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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