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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04756290650109866 3.5291e-08  
a 3.100950762330442 1.2423e-08 au
q 2.953460531157209 1.1249e-07 au
i 13.27137278486849 3.9931e-06 deg
node 245.6552191911024 1.5528e-05 deg
peri 54.01104653864306 4.1838e-05 deg
M 348.9627932415381 3.8174e-05 deg
tp 2459061.650133568693
(2020-Jul-31.15013357)
0.0002115 TDB
period 1994.530732864258
5.46
1.1985e-05
3.281e-08
d
yr
n .1804935838130806 1.0846e-09 deg/d
Q 3.248440993503676 1.3014e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3161  
   data-arc span      32350 days (88.57 yr)  
   first obs. used      1932-04-04  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39646  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:21:02  

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. 2019-August); 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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