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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09295934754185682 4.0376e-08  
a 3.174976302730294 1.5025e-08 au
q 2.879832577167629 1.3105e-07 au
i 15.64966226012648 4.4147e-06 deg
node 70.81084810965268 1.5672e-05 deg
peri 291.5686307763732 2.7799e-05 deg
M 284.4567088901498 2.4841e-05 deg
tp 2459434.113265107300
(2021-Aug-07.61326511)
0.00014393 TDB
period 2066.375096256217
5.66
1.4668e-05
4.016e-08
d
yr
n .174218127508522 1.2367e-09 deg/d
Q 3.470120028292959 1.6422e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2818  
   data-arc span      38255 days (104.74 yr)  
   first obs. used      1916-02-21  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41597  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:21  

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. 2020-October); 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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