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3914 Kotogahama (1987 SE)
Classification: Main-belt Asteroid          SPK-ID: 2003914
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07739192610669357 3.2842e-08  
a 3.015411803342138 1.5572e-08 au
q 2.782043275876632 9.6847e-08 au
i 9.328348124111997 3.9378e-06 deg
node 321.5185699707511 2.2894e-05 deg
peri 317.0952784712457 3.5669e-05 deg
M 161.3843891133423 2.8353e-05 deg
tp 2458143.112012586140
(2018-Jan-24.61201259)
0.00014996 TDB
period 1912.574550517486
5.24
1.4815e-05
4.056e-08
d
yr
n .1882279568671426 1.4581e-09 deg/d
Q 3.248780330807645 1.6777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2644  
   data-arc span      25447 days (69.67 yr)  
   first obs. used      1950-08-14  
   last obs. used      2020-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42373  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:00:58  

Additional Information
 Earth MOID = 1.77429 au 
 Jupiter MOID = 1.96193 au 
 T_jup = 3.223 
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Orbital Elements at Epoch 2457039.5 (2015-Jan-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08058527037177597 3.2853e-08  
q 2.769471895011754 9.7208e-08 au
tp 2456230.533532561319
(2012-Oct-30.03353256)
0.0001437 TDB
node 321.6508151719941 2.2827e-05 deg
peri 316.6885382002105 3.4837e-05 deg
i 9.348161082541159 3.9438e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2644  
   data-arc span      25447 days (69.67 yr)  
   first obs. used      1950-08-14  
   last obs. used      2020-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42373  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:00:58  

Additional Information
 Jupiter MOID = 1.96193 au 
 T_jup = 3.223 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.079307278307123E-15 -3.160726575058695E-15 5.130615855352587E-13 1.336326270469531E-15 9.224008913130384E-14 6.542540989042056E-16
q -3.160726575058695E-15 9.449492204883355E-15 -1.598348401864304E-12 -4.218273104144868E-15 -2.735889640393394E-13 -1.58506378328671E-15
tp 5.130615855352587E-13 -1.598348401864304E-12 2.065050220219827E-8 -6.668977506292662E-12 3.798436725319897E-9 -2.390517603963897E-12
node 1.336326270469531E-15 -4.218273104144868E-15 -6.668977506292662E-12 5.210739688538964E-10 -5.148915331977625E-10 1.130674394949919E-11
peri 9.224008913130384E-14 -2.735889640393394E-13 3.798436725319897E-9 -5.148915331977625E-10 1.21361991659792E-9 -1.158463213330306E-11
i 6.542540989042056E-16 -1.58506378328671E-15 -2.390517603963897E-12 1.130674394949919E-11 -1.158463213330306E-11 1.555393967207438E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.7   n/a MPO358667  
diameter diameter 14.859 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.716 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.201   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3914 Kotogahama (1987 SE)          Discovered 1987-Sep-16 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 SE = 1950 PS = 1971 OJ1 = 1979 BM1 = 1984 BJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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