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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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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.


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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
(2018-Nov-24.36265058)
9.5756e-05 TDB
period 1644.637692189247
4.50
7.4696e-06
2.045e-08
d
yr
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 
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Orbital Elements at Epoch 2456781.5 (2014-May-04.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08564149564048816 3.0366e-08  
q 2.493519878991656 8.2094e-08 au
tp 2456804.516721432238
(2014-May-27.01672143)
9.7955e-05 TDB
node 300.8031072479477 2.5629e-05 deg
peri 117.1103050527635 3.3737e-05 deg
i 7.548228518814528 3.4373e-06 deg
  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
 Jupiter MOID = 2.29976 au 
 T_jup = 3.338 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.22115980731193E-16 -2.482558903298552E-15 -3.179310077302414E-13 -4.465998237352064E-15 -9.773757578366583E-14 -5.515295888951973E-16
q -2.482558903298552E-15 6.739440587749026E-15 8.770570589021768E-13 1.171063944749844E-14 2.661789709687342E-13 1.489324831019992E-15
tp -3.179310077302414E-13 8.770570589021768E-13 9.595181575214339E-9 3.066520428726649E-12 2.16063046689145E-9 -2.230666602195534E-12
node -4.465998237352064E-15 1.171063944749844E-14 3.066520428726649E-12 6.568581591958795E-10 -6.500411808505495E-10 1.371423199528146E-11
peri -9.773757578366583E-14 2.661789709687342E-13 2.16063046689145E-9 -6.500411808505495E-10 1.138218501148051E-9 -1.406828171417443E-11
i -5.515295888951973E-16 1.489324831019992E-15 -2.230666602195534E-12 1.371423199528146E-11 -1.406828171417443E-11 1.181479573863224E-11

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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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

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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 ]
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