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5134 Ebilson (1990 SM2)
Classification: Main-belt Asteroid          SPK-ID: 2005134
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03472878194373978 3.4833e-08  
a 2.790021453742213 1.293e-08 au
q 2.693127407056844 9.646e-08 au
i 8.103453176599562 3.7446e-06 deg
node 90.31411558663143 2.9982e-05 deg
peri 199.7337080219309 7.7095e-05 deg
M 213.2493767354631 7.3505e-05 deg
tp 2459694.384513350075
(2022-Apr-24.88451335)
0.00034903 TDB
period 1702.19668747664
4.66
1.1833e-05
3.24e-08
d
yr
n .2114914231995534 1.4702e-09 deg/d
Q 2.886915500427582 1.3379e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2590  
   data-arc span      26667 days (73.01 yr)  
   first obs. used      1947-06-15  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:16:55  

Additional Information
 Earth MOID = 1.67808 au 
 Jupiter MOID = 2.18291 au 
 T_jup = 3.314 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456920.5 (2014-Sep-20.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03635970730981097 3.4772e-08  
q 2.687262313442707 9.6606e-08 au
tp 2456275.872317488665
(2012-Dec-14.37231749)
0.00032687 TDB
node 90.44220294650022 2.995e-05 deg
peri 196.6397105515282 7.4195e-05 deg
i 8.108944958075531 3.7477e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2590  
   data-arc span      26667 days (73.01 yr)  
   first obs. used      1947-06-15  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:16:55  

Additional Information
 Jupiter MOID = 2.18291 au 
 T_jup = 3.314 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.209072688310611E-15 -3.331541922372973E-15 1.415987096645743E-12 -2.613874660597223E-15 3.121926041133524E-13 4.583022579979586E-16
q -3.331541922372973E-15 9.332631107294012E-15 -2.858524788011843E-12 5.73596121415209E-15 -6.344695528153133E-13 -9.7817326729225E-16
tp 1.415987096645743E-12 -2.858524788011843E-12 1.068456556652331E-7 -2.753272658688284E-11 2.221174264261304E-8 2.885486239265125E-12
node -2.613874660597223E-15 5.73596121415209E-15 -2.753272658688284E-11 8.970251422303823E-10 -8.934428254872794E-10 1.024079844262851E-11
peri 3.121926041133524E-13 -6.344695528153133E-13 2.221174264261304E-8 -8.934428254872794E-10 5.504894394608701E-9 -9.524008240728546E-12
i 4.583022579979586E-16 -9.7817326729225E-16 2.885486239265125E-12 1.024079844262851E-11 -9.524008240728546E-12 1.404545894050266E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.9   n/a MPO502202  
diameter diameter 10.750 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.222   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sl   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

5134 Ebilson           Discovered 1990 Sept. 17 by H. E. Holt at Palomar.
Named in honor of Elizabeth M. Bilson (b. 1937), administrative director of the Center for Radiophysics and Space Research (CRSR), Cornell University. Raised in Hungary, Bilson studied at the Sorbonne and obtained her Ph.D. in chemistry from the University of Illinois at Champaign-Urbana. She was a research associate under Thomas Gold at the CRSR from 1969 to 1983, directing the Lunar Laboratory, and she has coauthored numerous articles related to the physical properties of lunar material, in particular explaining the reason for the low albedo of the moon. She is also a very a good cook. Name proposed by B. E. Clark, and citation written by M. Bilson.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1990 SM2 = 1947 LL = 1981 WN6 = 1983 CG = 1985 PL2 = 1986 WS6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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