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85774 (1998 UT18)
Classification: Apollo [NEO, PHA]          SPK-ID: 2085774
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.
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 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3291573975234456 2.6949e-08  
a 1.403684264996351 4.2558e-10 AU
q .9416512053855414 3.7783e-08 AU
i 13.58966993339403 9.8657e-06 deg
node 64.69052316901406 4.198e-06 deg
peri 50.03043960532498 1.1011e-05 deg
M 208.0713027812761 3.583e-06 deg
tp 2456656.853875438888
(2013-Dec-30.35387544)		 6.0285e-06 JED
period 607.4388634106308
1.66		 2.7625e-07
7.563e-10		 d
yr
n .5926522349569174 2.6953e-10 deg/d
Q 1.86571732460716 5.6566e-10 AU
   Orbit Determination Parameters
   # obs. used (total)      471  
   # delay obs. used      3  
   # Doppler obs. used      4  
   data-arc span      7350 days (20.12 yr)  
   first obs. used      1989-04-30  
   last obs. used      2009-06-14  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .47301  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 15:38:30  

Additional Information
 Earth MOID = .0355588 AU 
 T_jup = 4.660 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 19.106 mag .667 96 autocmod 2.5c
rotation period rot_per 34. h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Krugly, Yu.N.; Bel'skaya, I.N.; Shevchenko, V.G.; et al. (2002) Icarus 158, 294-304.]
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

85774 (1998 UT18)          Discovered 1998-Oct-27 by CSS at Catalina (703)
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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