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11987 Yonematsu (1995 VU1)
Classification: Main-belt Asteroid          SPK-ID: 2011987
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09224697734247563 2.5873e-08  
a 2.701328702038773 1.2715e-08 au
q 2.452139294467223 6.9024e-08 au
i 13.73535169224902 8.783e-07 deg
node 70.77796174133979 3.1199e-06 deg
peri 91.82791712143913 7.8259e-06 deg
M 147.1973613723686 8.8967e-06 deg
tp 2458537.425844724590
(2019-Feb-22.92584472)
3.7332e-05 TDB
period 1621.677818634846
4.44
1.145e-05
3.135e-08
d
yr
n .2219923068954928 1.5673e-09 deg/d
Q 2.950518109610323 1.3888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1927  
   data-arc span      20345 days (55.70 yr)  
   first obs. used      1964-11-09  
   last obs. used      2020-07-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:54:24  

Additional Information
 Earth MOID = 1.50568 au 
 Jupiter MOID = 2.15384 au 
 T_jup = 3.320 
[ 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 13.07   n/a E2021B10  
diameter diameter 14.436 km 0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

11987 Yonematsu           Discovered 1995 Nov. 15 by K. Endate and K. Watanabe at Kitami.
Yonematsu Shiono (b. 1947) is an investigator of traditional life in Japan and has published many articles and books on it. He also published many books on outdoor life, including astronomical observations.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030910/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1995 VU1 = 1964 VU1 = 1983 AJ3 = 1993 MN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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