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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04756290661129741 3.5282e-08  
a 3.100950762213112 1.2407e-08 au
q 2.953460530703738 1.1245e-07 au
i 13.27137286242597 3.9844e-06 deg
node 245.6552191466734 1.5527e-05 deg
peri 54.0110463646024 4.1793e-05 deg
M 348.9627934867589 3.8113e-05 deg
tp 2459061.650132206610
(2020-Jul-31.15013221)
0.00021116 TDB
period 1994.530732751058
5.46
1.197e-05
3.277e-08
d
yr
n .1804935838233245 1.0833e-09 deg/d
Q 3.248440993722486 1.2997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3178  
   data-arc span      32363 days (88.61 yr)  
   first obs. used      1932-04-04  
   last obs. used      2020-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39546  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:59:22  

Additional Information
 Earth MOID = 1.95765 au 
 Jupiter MOID = 1.86302 au 
 T_jup = 3.179 
[ 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 9.7   n/a MPO347525  
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

[ hide close-approach data ]
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 1.8811881307428 1.88118778973962 1.88118847174608 4.87454102472511 4.78127927784365 2425860.233138882 1.40161231323437 145.544272583416 15.8281106378706 88.9169594445729 4660565.43091038 T 39 CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:30 2020-Dec-18 01:59
2000-May-25 19:09 < 00:01 Jupiter 1.89734226519989 1.8973419289891 1.89734260141068 4.78900225797694 4.69485793724888 2451690.297893699 0.264761279099906 43.5401668685076 15.0036624470722 -82.9250951434901 4613720.38982953 T 39 CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:30 2020-Dec-18 01:59
2060-Dec-20 08:20 < 00:01 Jupiter 1.97792624031377 1.97792577723067 1.97792670339709 4.74764732064377 4.65657382096414 2473813.847346064 0.825181343834961 80.9909686673782 21.2676176746621 84.1297047496495 4650885.27403099 T 39 CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:30 2020-Dec-18 01:59
2071-Feb-08 16:29 00:01 Jupiter 1.95559498547231 1.95559446145782 1.9555955094878 4.61596817559414 4.52116208920881 2477516.187115189 1.03954286990868 92.1765536574464 14.661436942797 -76.2705928076914 4649069.94419969 T 39 CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:30 2020-Dec-18 01:59
2131-Sep-11 11:19 00:02 Jupiter 1.90871696447581 1.90871643362696 1.90871749532836 4.8673047401405 4.77526173799039 2499644.971201229 1.98491867997373 185.715765125386 17.8598464380823 83.9641381536821 4625987.89288063 T 39 CATAB v2.0f-lin.ifort 2020-Dec-18 01:59:30 2020-Dec-18 01:59

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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