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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1377896324701448 4.6812e-08  
a 2.671623666457031 1.5135e-08 au
q 2.303501623357376 1.264e-07 au
i 2.623975103870185 4.8816e-06 deg
node 95.80991993089775 0.0001102 deg
peri 243.6025729209069 0.00011181 deg
M 219.8729659939185 2.1131e-05 deg
tp 2458221.341556009352
(2018-Apr-12.84155601)
9.5683e-05 JED
period 1595.002432961412
4.37
1.3554e-05
3.711e-08
d
yr
n .2257049848705212 1.918e-09 deg/d
Q 3.039745709556686 1.7221e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1657  
   data-arc span      29420 days (80.55 yr)  
   first obs. used      1935-09-28  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47964  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:41:47  

Additional Information
 Earth MOID = 1.29527 au 
 Jupiter MOID = 2.322 au 
 T_jup = 3.366 
[ 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. 2016-February); 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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