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15739 Matsukuma (1991 ER)
Classification: Main-belt Asteroid          SPK-ID: 2015739
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08190528287232282 3.1146e-08  
a 2.513458678384676 9.1938e-09 au
q 2.307593134343684 7.7741e-08 au
i 8.052645325845697 3.7706e-06 deg
node 165.0689133884109 2.1422e-05 deg
peri 331.5685313463414 3.1812e-05 deg
M 246.8649216179349 2.4584e-05 deg
tp 2459853.904921165869
(2022-Oct-01.40492117)
0.00010044 TDB
period 1455.47936126075
3.98
7.9858e-06
2.186e-08
d
yr
n .2473411918999419 1.3571e-09 deg/d
Q 2.719324222425667 9.9468e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2080  
   data-arc span      10837 days (29.67 yr)  
   first obs. used      1991-03-09  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5236  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:07:40  

Additional Information
 Earth MOID = 1.32445 au 
 Jupiter MOID = 2.28975 au 
 T_jup = 3.442 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457163.5 (2015-May-21.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08159373841684474 3.0653e-08  
q 2.308868905752097 7.6495e-08 au
tp 2456935.397013898578
(2014-Oct-04.89701390)
9.597e-05 TDB
node 165.1884231815475 2.1468e-05 deg
peri 330.0353520526045 3.2095e-05 deg
i 8.042300221904835 3.767e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2080  
   data-arc span      10837 days (29.67 yr)  
   first obs. used      1991-03-09  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5236  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:07:40  

Additional Information
 Jupiter MOID = 2.28975 au 
 T_jup = 3.442 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.396177331815124E-16 -2.330615102896969E-15 1.135139490114994E-12 1.130330684531169E-14 2.56608608996817E-13 1.755321367459834E-15
q -2.330615102896969E-15 5.851432786607333E-15 -2.60008443632039E-12 -2.793733974980034E-14 -5.806538687543253E-13 -4.13738932272372E-15
tp 1.135139490114994E-12 -2.60008443632039E-12 9.210220346977205E-9 1.149215657258037E-11 2.29697478145882E-9 5.989020296068201E-12
node 1.130330684531169E-14 -2.793733974980034E-14 1.149215657258037E-11 4.60875381252517E-10 -4.531969023540148E-10 1.731000674196778E-11
peri 2.56608608996817E-13 -5.806538687543253E-13 2.29697478145882E-9 -4.531969023540148E-10 1.030093947280212E-9 -1.565887601009471E-11
i 1.755321367459834E-15 -4.13738932272372E-15 5.989020296068201E-12 1.731000674196778E-11 -1.565887601009471E-11 1.419051616605824E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.28   n/a MPCxxxxx  
diameter diameter 5.058 km 0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.154   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15739 Matsukuma           Discovered 1991 Mar. 9 by T. Seki at Geisei.
Astronomer Takehiko Matsukuma (1890-1950), specialized in celestial mechanics, particularly the three-body problem, and held a professorship of Tohoku University. He wrote Tenmongaku Shinwa (New Astronomy) for students in 1942, which was the first astronomy book that the discoverer of this minor planet encountered.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111012/MPCPages.arcLast Updated: 2011-10-13

Alternate Designations
 1991 ER = 1999 FU9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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