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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2386523758977771 3.0967e-08  
a 2.674227240491972 1.0317e-08 au
q 2.036016555858007 8.4884e-08 au
i 11.20311119610053 3.6371e-06 deg
node 187.1223487660301 1.889e-05 deg
peri 97.64978880538675 2.0792e-05 deg
M 141.436096506477 7.6124e-06 deg
tp 2458372.942317739993
(2018-Sep-11.44231774)
3.2922e-05 TDB
period 1597.334564470652
4.37
9.2437e-06
2.531e-08
d
yr
n .2253754523363126 1.3042e-09 deg/d
Q 3.312437925125937 1.2779e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1435  
   data-arc span      16131 days (44.16 yr)  
   first obs. used      1975-09-30  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48804  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:39:54  

Additional Information
 Earth MOID = 1.05674 au 
 Jupiter MOID = 2.0088 au 
 T_jup = 3.312 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457067.5 (2015-Feb-14.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .239345643476405 3.08e-08  
q 2.033345779175565 8.4443e-08 au
tp 2456777.764671229059
(2014-Apr-30.26467123)
3.2595e-05 TDB
node 187.1431734463717 1.8877e-05 deg
peri 97.83667389689775 2.0782e-05 deg
i 11.20856543922884 3.6389e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1435  
   data-arc span      16131 days (44.16 yr)  
   first obs. used      1975-09-30  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48804  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:39:54  

Additional Information
 Jupiter MOID = 2.0088 au 
 T_jup = 3.312 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.486151329224241E-16 -2.590020836249398E-15 -1.417234167837609E-13 1.179646165208768E-15 -5.022402040678509E-14 -4.402294299899953E-15
q -2.590020836249398E-15 7.13053698337044E-15 3.484388334000534E-13 -3.02754663217805E-15 1.306878167297394E-13 1.255675613597716E-14
tp -1.417234167837609E-13 3.484388334000534E-13 1.062402689160961E-9 -8.026016296283324E-12 2.956235714428662E-10 2.089241764762403E-12
node 1.179646165208768E-15 -3.02754663217805E-15 -8.026016296283324E-12 3.563387056943889E-10 -3.514488435652616E-10 8.679026387123358E-12
peri -5.022402040678509E-14 1.306878167297394E-13 2.956235714428662E-10 -3.514488435652616E-10 4.318814110217547E-10 -7.900746875829438E-12
i -4.402294299899953E-15 1.255675613597716E-14 2.089241764762403E-12 8.679026387123358E-12 -7.900746875829438E-12 1.324187176909998E-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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