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4927 O'Connell (1982 UP2)
Classification: Main-belt Asteroid          SPK-ID: 2004927
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08746214833953481 4.7056e-08  
a 2.88630944556922 1.5152e-08 au
q 2.633866620687044 1.3375e-07 au
i 1.16376250045685 4.9156e-06 deg
node 329.0354615503492 0.0002051 deg
peri 40.51121199531273 0.0002063 deg
M 183.4510826687245 2.3112e-05 deg
tp 2459478.865603608651
(2021-Sep-21.36560361)
0.0001173 TDB
period 1791.070837924066
4.90
1.4104e-05
3.861e-08
d
yr
n .2009970752565301 1.5828e-09 deg/d
Q 3.138752270451396 1.6478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1708  
   data-arc span      17017 days (46.59 yr)  
   first obs. used      1972-10-07  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48244  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:46:21  

Additional Information
 Earth MOID = 1.63232 au 
 Jupiter MOID = 2.31076 au 
 T_jup = 3.286 
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Orbital Elements at Epoch 2456295.5 (2013-Jan-03.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08737599479595527 4.7034e-08  
q 2.636484362611042 1.3419e-07 au
tp 2455903.206075618402
(2011-Dec-07.70607562)
0.00011116 TDB
node 329.0974411649117 0.00020525 deg
peri 41.98798699897178 0.00020646 deg
i 1.162988560721335 4.9131e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1708  
   data-arc span      17017 days (46.59 yr)  
   first obs. used      1972-10-07  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48244  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:46:21  

Additional Information
 Jupiter MOID = 2.31076 au 
 T_jup = 3.286 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.212167377996864E-15 -6.279066865569674E-15 -8.195716593037387E-13 1.181666831507662E-14 -1.692838815134659E-13 2.246417546574015E-16
q -6.279066865569674E-15 1.800782226016323E-14 2.513442778242251E-12 -3.617055767273956E-14 5.277339383318131E-13 -6.190824578958966E-16
tp -8.195716593037387E-13 2.513442778242251E-12 1.235648047561825E-8 -1.747919917907803E-11 2.502173224538232E-9 1.606372041999957E-13
node 1.181666831507662E-14 -3.617055767273956E-14 -1.747919917907803E-11 4.212803679939725E-8 -4.212223004493187E-8 2.798487227563341E-10
peri -1.692838815134659E-13 5.277339383318131E-13 2.502173224538232E-9 -4.212223004493187E-8 4.262599152984185E-8 -2.797471057269605E-10
i 2.246417546574015E-16 -6.190824578958966E-16 1.606372041999957E-13 2.798487227563341E-10 -2.797471057269605E-10 2.413859836406887E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2   n/a MPO395045  
diameter diameter 7.040 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.78 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
geometric albedo albedo 0.205   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4927 O'Connell (1982 UP2)          Discovered 1982-Oct-21 by Vavrova, Z. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1982 UP2 = 1972 TX = 1987 YC4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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