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13577 Ukawa (1993 HR1)
Classification: Main-belt Asteroid          SPK-ID: 2013577
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1691471022201925 5.084e-08  
a 2.404578563440071 1.5001e-08 AU
q 1.99785106737339 1.2577e-07 AU
i 3.043927073050916 5.1743e-06 deg
node 110.2714033052853 0.00010506 deg
peri 115.7758852663367 0.00010628 deg
M 278.8288570236927 1.7723e-05 deg
tp 2457307.583190463720
6.8303e-05 JED
period 1361.93657639153
n .2643294895227978 2.4735e-09 deg/d
Q 2.811306059506752 1.7538e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      919  
   data-arc span      8952 days (24.51 yr)  
   first obs. used      1990-08-24  
   last obs. used      2015-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5284  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:35:24  

Additional Information
 Earth MOID = .992175 AU 
 T_jup = 3.502 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7 mag n/a MPO324434  

13577 Ukawa           Discovered 1993 Apr. 16 by K. Endate and K. Watanabe at Kitami.
Hirohumi Ukawa (b. 1942) mentored many an astronomical amateur and astronomy specialist by the time of his retirement from many years of distinguished services at the Takamatsu Municipal Planetarium. He also acted as the volunteer president of the Astronomical Society of Shikoku during his tenure.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100130/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1993 HR1 = 1990 QJ16 = 1991 XQ6 = 1994 RZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2015-Mar-27 01:57 UT
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