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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 
[ 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 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1929-Sep-05 17:36 00:01 Jupiter 1.8811881283696 1.88118778817269 1.88118846856671 4.87454101590758 4.78127926873533 2425860.233134400 1.39809785219209 145.15955577639 15.7728048542561 88.8785964110316 4685037.67715635 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:53:54 2021-Feb-24 00:53
2000-May-25 19:09 < 00:01 Jupiter 1.89734226292025 1.89734192766611 1.8973425981744 4.78900224522804 4.69485792413008 2451690.297890604 0.264632710971512 43.5351426784483 14.9628170467557 -82.9475703793112 4636713.05598732 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:53:54 2021-Feb-24 00:53
2060-Dec-20 08:20 < 00:01 Jupiter 1.97792623567269 1.97792577533395 1.97792669601166 4.74764734025601 4.65657384074417 2473813.847336852 0.822317999724195 80.7090409523576 21.1540123085642 84.1624201317003 4664919.98551096 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:53:54 2021-Feb-24 00:53
2071-Feb-08 16:29 00:01 Jupiter 1.95559498667335 1.95559446282827 1.95559551051943 4.61596819425311 4.52116210831788 2477516.187115469 1.03560673854936 91.8208431521051 14.6051015845885 -76.1989514587462 4674603.45256854 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:53:54 2021-Feb-24 00:53
2131-Sep-11 11:19 00:02 Jupiter 1.90871695846614 1.90871643128256 1.9087174856533 4.86730473998517 4.77526173753947 2499644.971192438 1.97849215253433 185.185510064044 17.7726766986172 83.9975085114152 4647324.82044178 T 40 CATAB v2.0f-lin.ifort 2021-Feb-24 00:53:54 2021-Feb-24 00:53

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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