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2455 Somville (1950 TO4)
Classification: Main-belt Asteroid          SPK-ID: 2002455
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08778907864263796 3.0468e-08  
a 2.726766030158397 8.2562e-09 au
q 2.487385752696747 8.26e-08 au
i 7.541742496725909 3.4355e-06 deg
node 300.7277070386982 2.5674e-05 deg
peri 116.3824434244365 3.3401e-05 deg
M 121.1874486019298 2.1031e-05 deg
tp 2458446.862650580609
9.5756e-05 TDB
period 1644.637692189247
n .2188931955711101 9.9416e-10 deg/d
Q 2.966146307620046 8.981e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3133  
   data-arc span      31589 days (86.49 yr)  
   first obs. used      1934-02-05  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:51:32  

Additional Information
 Earth MOID = 1.51099 au 
 Jupiter MOID = 2.29976 au 
 T_jup = 3.338 
[ show covariance matrix ]

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 11.8   n/a MPO337268  
diameter diameter 16.099 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 2.8287 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Franco, L.; Klinglesmith III, D.A.; DeHart, A.; Henderickx, S.; Hanowell, J. (2015) Minor Planet Bull. 42, 198-200.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.142   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
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)

2455 Somville (1950 TO4)          Discovered 1950-Oct-05 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1950 TO4 = 1934 CA1 = 1941 SM1 = 1950 TU = 1952 BT1 = 1959 SM = 1964 VQ = 1968 QA1 = 1972 NR = 1973 YO = 1979 BB2 = 1979 BO = 1981 PH = 1988 CN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Oct-25 23:32 UT
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