Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
2455 Somville (1950 TO4)
Classification: Main-belt Asteroid          SPK-ID: 2002455
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08785014009241762 2.1225e-08  
a 2.726471596549385 7.9547e-09 au
q 2.486950684834524 5.7128e-08 au
i 7.541677183086302 7.1527e-07 deg
node 300.7276784110779 2.5518e-06 deg
peri 116.1857620669548 6.5741e-06 deg
M 208.1058282864931 7.8717e-06 deg
tp 2460090.306721120637
(2023-May-25.80672112)
3.7776e-05 TDB
period 1644.371319753667
4.50
7.1964e-06
1.97e-08
d
yr
n .2189286541764359 9.5812e-10 deg/d
Q 2.965992508264246 8.6536e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3232  
   data-arc span      31919 days (87.39 yr)  
   first obs. used      1934-02-05  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41031  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 13:39:07  

Additional Information
 Earth MOID = 1.51017 au 
 Jupiter MOID = 2.30092 au 
 T_jup = 3.338 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.91   n/a E2021B10  
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. 2020-October); 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

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-26 16:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin