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2945 Zanstra (1935 ST1)
Classification: Main-belt Asteroid          SPK-ID: 2002945
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .138692229286748 4.7203e-08  
a 2.668829808072729 1.5565e-08 AU
q 2.298683852404199 1.2761e-07 AU
i 2.626268374461816 5.4862e-06 deg
node 95.89470245344955 0.00011243 deg
peri 242.7705983625436 0.00011425 deg
M 85.26634754061106 2.1359e-05 deg
tp 2456623.314572487352
(2013-Nov-26.81457249)
9.3775e-05 JED
period 1592.501119388045
4.36
1.3932e-05
3.814e-08
d
yr
n .2260594957310536 1.9776e-09 deg/d
Q 3.03897576374126 1.7724e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1455  
   data-arc span      29032 days (79.49 yr)  
   first obs. used      1935-09-28  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4827  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:41:36  

Additional Information
 Earth MOID = 1.29157 AU 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.6 mag n/a MPO337273  
diameter diameter 21.12 km 1.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 10.05 h n/a LCDB (Rev. 2015-May); 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 0.0522   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

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 | Physical Parameters | Discovery Circumstances ]
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