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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2386523671151885 3.0838e-08  
a 2.674227243662293 1.028e-08 au
q 2.036016581758361 8.4486e-08 au
i 11.20310883249639 3.6225e-06 deg
node 187.1223509480218 1.8838e-05 deg
peri 97.6498018196794 2.0718e-05 deg
M 141.4360868902503 7.6011e-06 deg
tp 2458372.942359291617
(2018-Sep-11.44235929)
3.2852e-05 TDB
period 1597.334567311134
4.37
9.2109e-06
2.522e-08
d
yr
n .2253754519355355 1.2996e-09 deg/d
Q 3.312437905566226 1.2734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1472  
   data-arc span      16192 days (44.33 yr)  
   first obs. used      1975-09-30  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48969  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:47:19  

Additional Information
 Earth MOID = 1.05674 au 
 Jupiter MOID = 2.0088 au 
 T_jup = 3.312 
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Orbital Elements at Epoch 2457092.5 (2015-Mar-11.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2393448179606361 3.0669e-08  
q 2.03329373984016 8.4035e-08 au
tp 2456777.750051927172
(2014-Apr-30.25005193)
3.2463e-05 TDB
node 187.1433386841868 1.8825e-05 deg
peri 97.83034193656447 2.0708e-05 deg
i 11.20869498534379 3.6244e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1472  
   data-arc span      16192 days (44.33 yr)  
   first obs. used      1975-09-30  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48969  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:47:19  

Additional Information
 Jupiter MOID = 2.0088 au 
 T_jup = 3.312 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.405826969237546E-16 -2.566526601248316E-15 -1.499146762581563E-13 9.725555681729396E-16 -5.272649273463418E-14 -4.306602028085711E-15
q -2.566526601248316E-15 7.061838124613552E-15 3.722825788316629E-13 -2.458959514636067E-15 1.380044513819828E-13 1.228893836369059E-14
tp -1.499146762581563E-13 3.722825788316629E-13 1.053815599361725E-9 -7.593690200224005E-12 2.923875692918756E-10 2.039454365460175E-12
node 9.725555681729396E-16 -2.458959514636067E-15 -7.593690200224005E-12 3.543713364007033E-10 -3.493916296461601E-10 9.130591706404492E-12
peri -5.272649273463418E-14 1.380044513819828E-13 2.923875692918756E-10 -3.493916296461601E-10 4.288167308669706E-10 -8.356374116421498E-12
i -4.306602028085711E-15 1.228893836369059E-14 2.039454365460175E-12 9.130591706404492E-12 -8.356374116421498E-12 1.313662610271316E-11

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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