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2945 Zanstra (1935 ST1)
Classification: Main-belt Asteroid          SPK-ID: 2002945
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1386728836708803 3.627e-08  
a 2.669443923519141 1.0118e-08 au
q 2.299264436847033 9.5424e-08 au
i 2.624639135164169 3.7447e-06 deg
node 95.77594367824824 8.05e-05 deg
peri 244.0782712520142 8.165e-05 deg
M 175.6936388913307 1.4765e-05 deg
tp 2458223.030846494974
(2018-Apr-14.53084650)
6.4437e-05 TDB
period 1593.050818617998
4.36
9.0573e-06
2.48e-08
d
yr
n .225981491483308 1.2848e-09 deg/d
Q 3.039623410191249 1.1521e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2685  
   data-arc span      30895 days (84.59 yr)  
   first obs. used      1935-09-28  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45157  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:47:34  

Additional Information
 Earth MOID = 1.29196 au 
 Jupiter MOID = 2.33539 au 
 T_jup = 3.366 
[ 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 12.7   n/a MPO502181  
diameter diameter 23.701 km 0.336 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 10.05 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.031   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2945 Zanstra (1935 ST1)          Discovered 1935-Sep-28 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1935 ST1 = 1957 UC1 = 1970 SY = 1970 WM = 1975 XY5 = 1983 TN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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