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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1386922292017085 4.7209e-08  
a 2.668829808127792 1.5567e-08 AU
q 2.29868385267858 1.2763e-07 AU
i 2.626268376498029 5.4862e-06 deg
node 95.89470215216252 0.00011244 deg
peri 242.7705986491827 0.00011427 deg
M 85.26634753976425 2.1359e-05 deg
tp 2456623.314572479425
(2013-Nov-26.81457248)
9.3775e-05 JED
period 1592.50111943733
4.36
1.3933e-05
3.815e-08
d
yr
n .2260594957240576 1.9779e-09 deg/d
Q 3.038975763577004 1.7726e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1451  
   data-arc span      29030 days (79.48 yr)  
   first obs. used      1935-09-28  
   last obs. used      2015-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48334  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:12:12  

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 12.5 mag n/a MPO267719  
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-Feb); 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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