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818 Kapteynia (A916 DF)
Classification: Main-belt Asteroid          SPK-ID: 2000818
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09412301017864255 4.3944e-08  
a 3.169218874903238 1.6014e-08 au
q 2.870922454482374 1.3967e-07 au
i 15.66594869564635 4.6097e-06 deg
node 70.81737143935428 1.6777e-05 deg
peri 292.5690510036798 2.8895e-05 deg
M 213.7096567441519 2.6031e-05 deg
tp 2459437.913457237533
(2021-Aug-11.41345724)
0.00015204 TDB
period 2060.756970665323
5.64
1.562e-05
4.277e-08
d
yr
n .1746930885711247 1.3241e-09 deg/d
Q 3.467515295324101 1.7522e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2540  
   data-arc span      37798 days (103.49 yr)  
   first obs. used      1916-02-21  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43671  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:12:24  

Additional Information
 Earth MOID = 1.91476 au 
 Jupiter MOID = 2.02933 au 
 T_jup = 3.138 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.3   n/a MPO358633  
diameter diameter 64.255 km 1.718 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.35 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Stephens, R.D. (2002) Minor Planet Bull. 29, 72-73.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.100   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

818 Kapteynia (A916 DF)          Discovered 1916-Feb-21 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A916 DF = 1929 JC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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