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13903 (1975 ST)
Classification: Main-belt Asteroid          SPK-ID: 2013903
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2386523672882065 3.0818e-08  
a 2.674227243825702 1.0257e-08 au
q 2.036016581420082 8.4445e-08 au
i 11.2031084842224 3.5804e-06 deg
node 187.1223506082179 1.8828e-05 deg
peri 97.64980164459729 2.0632e-05 deg
M 141.4360872104214 7.5261e-06 deg
tp 2458372.942357813484
(2018-Sep-11.44235781)
3.2474e-05 TDB
period 1597.334567457542
4.37
9.1897e-06
2.516e-08
d
yr
n .2253754519148782 1.2966e-09 deg/d
Q 3.312437906231322 1.2705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1487  
   data-arc span      16466 days (45.08 yr)  
   first obs. used      1975-09-30  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4889  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:43:23  

Additional Information
 Earth MOID = 1.05674 au 
 Jupiter MOID = 2.0088 au 
 T_jup = 3.312 
[ 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 14.3   n/a MPO452366  
diameter diameter 8.785 km 0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.933 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Clark, M. (2015) Minor Planet Bull. 42, 15-20.]
geometric albedo albedo 0.050   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13903 (1975 ST)          Discovered 1975-Sep-30 by Bus, S. J. at Palomar
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1975 ST = 1996 HV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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