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1243 Pamela (1932 JE)
Classification: Main-belt Asteroid          SPK-ID: 2001243
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04697047416537364 3.532e-08  
a 3.09879122176299 1.2661e-08 au
q 2.953239528737285 1.1235e-07 au
i 13.2626180110044 3.9585e-06 deg
node 245.5869007141292 1.5549e-05 deg
peri 53.21632707096241 4.2076e-05 deg
M 25.87293525197419 3.8351e-05 deg
tp 2459057.304258286703
(2020-Jul-26.80425829)
0.00021224 TDB
period 1992.447571747916
5.46
1.2212e-05
3.343e-08
d
yr
n .1806822950348363 1.1074e-09 deg/d
Q 3.244342914788696 1.3256e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3240  
   data-arc span      32407 days (88.73 yr)  
   first obs. used      1932-04-04  
   last obs. used      2020-12-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39271  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:53:46  

Additional Information
 Earth MOID = 1.95494 au 
 Jupiter MOID = 1.86314 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456589.5 (2013-Oct-24.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04623826076844737 3.4986e-08  
q 2.952992135782496 1.1081e-07 au
tp 2457091.223645526340
(2015-Mar-09.72364553)
0.00021931 TDB
node 245.6972205551892 1.5506e-05 deg
peri 57.7936418828536 4.312e-05 deg
i 13.28523167751699 3.9637e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3240  
   data-arc span      32407 days (88.73 yr)  
   first obs. used      1932-04-04  
   last obs. used      2020-12-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39271  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:53:46  

Additional Information
 Jupiter MOID = 1.86314 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.224019575090135E-15 -3.856034281482309E-15 -8.095315579146193E-13 1.993234171167837E-15 -1.502990273918735E-13 -1.483745262953853E-15
q -3.856034281482309E-15 1.22791133641306E-14 2.272716369450732E-12 -3.322172008830869E-15 4.129066134471749E-13 5.281685306197891E-15
tp -8.095315579146193E-13 2.272716369450732E-12 4.809756432467171E-8 -6.556983773559463E-12 8.840125406156294E-9 2.212539987329256E-12
node 1.993234171167837E-15 -3.322172008830869E-15 -6.556983773559463E-12 2.404446331377262E-10 -2.347606617738889E-10 7.534983190147699E-12
peri -1.502990273918735E-13 4.129066134471749E-13 8.840125406156294E-9 -2.347606617738889E-10 1.85929740918743E-9 -6.892672795655241E-12
i -1.483745262953853E-15 5.281685306197891E-15 2.212539987329256E-12 7.534983190147699E-12 -6.892672795655241E-12 1.571123066814118E-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 9.74   n/a E2021B10  
diameter diameter 69.883 km 0.420 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 26.017 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2000) Minor Planet Bull. 27, 4-6.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
geometric albedo albedo 0.040   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1243 Pamela (1932 JE)          Discovered 1932-May-07 by Jackson, C. at Johannesburg (UO)
Subsequently reported as discovered on Apr. 4 by E. L. Johnson.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1932 JE = 1929 XD = 1934 VL = 1951 AN = 1954 JO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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