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8139 Paulabell (1980 UM1)
Classification: Main-belt Asteroid          SPK-ID: 2008139
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09802110863297361 2.9913e-08  
a 2.252027103597092 7.1901e-09 au
q 2.031280910231001 6.8548e-08 au
i 4.840859699917772 3.4323e-06 deg
node 269.3124675093431 5.1096e-05 deg
peri 174.96156852384 5.741e-05 deg
M 218.0256087996211 2.7455e-05 deg
tp 2459487.317700603616
(2021-Sep-29.81770060)
9.5267e-05 TDB
period 1234.408337556824
3.38
5.9117e-06
1.619e-08
d
yr
n .2916376931741423 1.3967e-09 deg/d
Q 2.472773296963184 7.8948e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1989  
   data-arc span      24479 days (67.02 yr)  
   first obs. used      1953-10-12  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46205  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:23:02  

Additional Information
 Earth MOID = 1.04746 au 
 Jupiter MOID = 2.69433 au 
 T_jup = 3.615 
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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 14.6   n/a MPO473878  
diameter diameter 2.856 km 0.486 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.453   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8139 Paulabell           Discovered 1980 Oct. 31 by S. J. Bus at Palomar.
Paul A. Abell (b. 1965) is lead scientist for small bodies in the Astromaterials Research and Exploration Science Directorate at the NASA Johnson Space Center. His research includes characterization of minor-planet compositions and scientific planning for human exploration of minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

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Alternate Designations
 1980 UM1 = 1970 WH1 = 1987 XA1 
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