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JPL Small-Body Database Browser
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2555 Thomas (1980 OC)
Classification: Main-belt Asteroid          SPK-ID: 2002555
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08064388413395314 3.5726e-08  
a 2.869531291488384 1.1221e-08 au
q 2.638121142498842 1.0594e-07 au
i .9022590652556515 3.4486e-06 deg
node 282.8746229709146 0.00024142 deg
peri 91.0588870630597 0.00024241 deg
M 308.1979765569743 2.1435e-05 deg
tp 2458855.981288402338
(2020-Jan-07.48128840)
0.00010574 TDB
period 1775.476278952659
4.86
1.0415e-05
2.851e-08
d
yr
n .202762494924664 1.1894e-09 deg/d
Q 3.100941440477927 1.2126e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2833  
   data-arc span      24945 days (68.30 yr)  
   first obs. used      1951-08-11  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48652  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:37:03  

Additional Information
 Earth MOID = 1.63791 au 
 Jupiter MOID = 2.32173 au 
 T_jup = 3.294 
[ 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 11.9   n/a MPO347540  
diameter diameter 10.256 km 1.605 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.320   0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2555 Thomas (1980 OC)          Discovered 1980-Jul-17 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1980 OC = 1961 US = 1971 UZ2 = 1976 YQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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