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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09295934691478021 4.0451e-08  
a 3.174976302510062 1.5059e-08 au
q 2.879832578958823 1.3123e-07 au
i 15.64966241331389 4.4248e-06 deg
node 70.81084769623257 1.5691e-05 deg
peri 291.5686308126391 2.7845e-05 deg
M 284.4567093552722 2.491e-05 deg
tp 2459434.113262392414
(2021-Aug-07.61326239)		 0.00014433 TDB
period 2066.375096041216
5.66		 1.4701e-05
4.025e-08		 d
yr
n .1742181275266489 1.2395e-09 deg/d
Q 3.470120026061302 1.6459e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2799  
   data-arc span      38237 days (104.69 yr)  
   first obs. used      1916-02-21  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41707  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:25:27  

Additional Information
 Earth MOID = 1.92481 au 
 Jupiter MOID = 2.01832 au 
 T_jup = 3.137 
[ 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-August); 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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