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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1378848305989049 4.6915e-08  
a 2.671910574643622 1.5384e-08 au
q 2.303494637683463 1.2657e-07 au
i 2.624585968478046 5.4452e-06 deg
node 95.86574071099143 0.00011157 deg
peri 243.2475203509761 0.00011339 deg
M 175.1259360535404 2.1618e-05 deg
tp 2456624.468636223586
(2013-Nov-27.96863622)
9.4187e-05 JED
period 1595.259373083939
4.37
1.3777e-05
3.772e-08
d
yr
n .2256686317435964 1.9489e-09 deg/d
Q 3.04032651160378 1.7505e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1499  
   data-arc span      29301 days (80.22 yr)  
   first obs. used      1935-09-28  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48054  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:45:53  

Additional Information
 Earth MOID = 1.29398 au 
 Jupiter MOID = 2.3192 au 
 T_jup = 3.365 
[ 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-December); 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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