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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04697047209766465 3.4974e-08  
a 3.098791224205442 1.2644e-08 au
q 2.953239537472412 1.1139e-07 au
i 13.26261761424835 3.9297e-06 deg
node 245.5868994828056 1.5469e-05 deg
peri 53.21632848080431 4.199e-05 deg
M 25.87293457061956 3.8314e-05 deg
tp 2459057.304261888413
(2020-Jul-26.80426189)
0.00021203 TDB
period 1992.447574103571
5.46
1.2195e-05
3.339e-08
d
yr
n .180682294821217 1.1059e-09 deg/d
Q 3.244342910938471 1.3238e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3263  
   data-arc span      32407 days (88.73 yr)  
   first obs. used      1932-04-04  
   last obs. used      2020-12-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39161  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:11:36  

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

[ 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 1.88118815471501 1.88118781755778 1.88118849187245 4.87454107721518 4.78127933307784 2425860.233492049 1.39489107143272 144.872971326867 15.6523428110484 88.9266153233519 4719838.77764089 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:12:06 2021-Apr-12 12:12
2000-May-25 19:09 < 00:01 Jupiter 1.89734222472334 1.89734189106249 1.8973425583843 4.78900223115687 4.69485790838775 2451690.297878454 0.26416100772749 43.3660562324864 14.8829062491296 -82.8794464202499 4666009.92048341 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:12:06 2021-Apr-12 12:12
2060-Dec-20 08:21 < 00:01 Jupiter 1.97792624105656 1.97792578146684 1.97792670064651 4.74764627776597 4.65657275823226 2473813.847613493 0.820100999214526 80.2696144418165 21.0501118897092 83.995595995286 4717775.86576087 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:12:06 2021-Apr-12 12:12
2071-Feb-08 16:30 00:01 Jupiter 1.95559457273748 1.95559405106353 1.95559509441244 4.61596874256897 4.52116264838306 2477516.187676325 1.03334603465601 91.5807374865984 14.5859059180478 -76.2311603814141 4690664.39361834 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:12:06 2021-Apr-12 12:12
2131-Sep-11 11:21 00:02 Jupiter 1.9087174649872 1.90871693787661 1.90871799210137 4.86730313961146 4.77526013149307 2499644.973182264 1.97446931449905 184.706931805335 17.6409502069745 83.9452527922947 4687897.90375412 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:12:06 2021-Apr-12 12:12

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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