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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457139.5 (2015-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2393513613472069 3.0651e-08  
q 2.033172085721293 8.3997e-08 au
tp 2456777.723442039018
(2014-Apr-30.22344204)
3.1972e-05 TDB
node 187.1438409401782 1.8814e-05 deg
peri 97.81758245166459 2.0622e-05 deg
i 11.20893978176552 3.5823e-06 deg
  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
 Jupiter MOID = 2.0088 au 
 T_jup = 3.312 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.395110127274562E-16 -2.563968759477077E-15 -1.450684764471274E-13 1.057631927120909E-15 -5.130619114195432E-14 -4.181191014104658E-15
q -2.563968759477077E-15 7.055471350494416E-15 3.623863182444135E-13 -2.709378717424948E-15 1.351877053865074E-13 1.193880263901425E-14
tp -1.450684764471274E-13 3.623863182444135E-13 1.022227077828672E-9 -7.439173703229203E-12 2.823726988933925E-10 1.980417667195675E-12
node 1.057631927120909E-15 -2.709378717424948E-15 -7.439173703229203E-12 3.539749685989526E-10 -3.489523955509994E-10 8.832465064647436E-12
peri -5.130619114195432E-14 1.351877053865074E-13 2.823726988933925E-10 -3.489523955509994E-10 4.252556974631715E-10 -8.081421415318728E-12
i -4.181191014104658E-15 1.193880263901425E-14 1.980417667195675E-12 8.832465064647436E-12 -8.081421415318728E-12 1.283307911710814E-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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