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8872 Ebenum (1992 GA4)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008872
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09337245656765551 3.0211e-08  
a 3.216281235452129 1.6891e-08 au
q 2.91596915548551 1.007e-07 au
i 1.435119717813803 4.0621e-06 deg
node 156.8327540716142 0.00013362 deg
peri 103.4423737981801 0.00013545 deg
M 274.3535160235771 2.2614e-05 deg
tp 2459501.729346081292
(2021-Oct-14.22934608)
0.00013247 TDB
period 2106.829798628256
5.77
1.6597e-05
4.544e-08
d
yr
n .1708728442299392 1.3461e-09 deg/d
Q 3.516593315418748 1.8468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2012  
   data-arc span      10642 days (29.14 yr)  
   first obs. used      1991-03-10  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52284  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:04:06  

Additional Information
 Earth MOID = 1.90103 au 
 Jupiter MOID = 1.53215 au 
 T_jup = 3.183 
[ 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 13.2   n/a MPO337332  
diameter diameter 12.164 km 0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.547 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.069   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8872 Ebenum           Discovered 1992 Apr. 4 by E. W. Elst at the European Southern Observatory.
Named for Ebenaceae, the ebony family, with only two genera and 500 species. Male and female flowers are usually borne on separate plants. The Dispyros genus dominates, the fruit of the Diospyros virginiana (persimmon) being good to eat. Diospyros ebenum (Macassar ebony) is a valuable wood.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1992 GA4 = 1991 EB7 = 1997 CJ15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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