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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1387737425452756 5.3103e-08  
a 2.668635540802939 1.7481e-08 AU
q 2.29829899931638 1.4639e-07 AU
i 2.626330345220347 5.5175e-06 deg
node 95.89404949587544 0.00012444 deg
peri 242.723515701079 0.00012611 deg
M 40.08727340262015 2.1307e-05 deg
tp 2456623.188729120739
(2013-Nov-26.68872912)
9.3877e-05 JED
period 1592.327242499907
4.36
1.5646e-05
4.284e-08
d
yr
n .2260841806831179 2.2214e-09 deg/d
Q 3.038972082289499 1.9907e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1314  
   data-arc span      28511 days (78.06 yr)  
   first obs. used      1935-09-28  
   last obs. used      2013-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49262  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:46:29  

Additional Information
 Earth MOID = 1.28941 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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