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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388771762468243 3.5569e-08  
a 2.668924516530915 9.9224e-09 au
q 2.29827181605918 9.3791e-08 au
i 2.624624440087168 3.6397e-06 deg
node 95.77337544882477 8.0183e-05 deg
peri 244.11807830 8.1299e-05 deg
M 220.8548472993637 1.4737e-05 deg
tp 2459816.057241064006
(2022-Aug-24.55724106)
6.6208e-05 TDB
period 1592.585889497743
4.36
8.8813e-06
2.432e-08
d
yr
n .2260474630436 1.2606e-09 deg/d
Q 3.039577217002648 1.13e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2830  
   data-arc span      31164 days (85.32 yr)  
   first obs. used      1935-09-28  
   last obs. used      2021-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45136  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:06:46  

Additional Information
 Earth MOID = 1.28912 au 
 Jupiter MOID = 2.33573 au 
 T_jup = 3.367 
[ 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 12.73   n/a E2021B10  
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. 2020-October); 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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