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11921 Mitamasahiro (1992 UN3)
Classification: Main-belt Asteroid          SPK-ID: 2011921
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01658669812411722 1.3289e-08  
a 2.692053101740969 1.2218e-08 au
q 2.647400829608299 3.4548e-08 au
i 14.2448075537631 2.0908e-07 deg
node 233.733100399295 3.1566e-06 deg
peri 189.2480440866387 7.259e-05 deg
M 113.0950290677576 7.0167e-05 deg
tp 2458693.667009457739
(2019-Jul-29.16700946)
0.00031404 TDB
period 1613.332416988006
4.42
1.0983e-05
3.007e-08
d
yr
n .2231406226077688 1.5191e-09 deg/d
Q 2.73670537387364 1.2421e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2454  
   data-arc span      15526 days (42.51 yr)  
   first obs. used      1978-08-31  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40533  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:01:51  

Additional Information
 Earth MOID = 1.65862 au 
 Jupiter MOID = 2.3454 au 
 T_jup = 3.327 
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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 12.88   n/a E2021B10  
diameter diameter 14.345 km 7.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.071   0.399 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

11921 Mitamasahiro           Discovered 1992 Oct. 26 by K. Endate and K. Watanabe at Kitami.
Masahiro Mita (b. 1948) is a well-known writer. In 1977 he won the Akutagawa Prize, which is one of the most important prizes in Japan for a novelist.
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

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Alternate Designations
 1992 UN3 = 1978 QF = 1979 YO4 = 1999 JU18 
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