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20358 Dalem (1998 HD148)
Classification: Main-belt Asteroid          SPK-ID: 2020358
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .147465810359427 4.1104e-08  
a 2.59971879928088 1.3131e-08 au
q 2.216349159838289 1.0816e-07 au
i 12.14959563439978 4.8435e-06 deg
node 234.5317870882163 1.8393e-05 deg
peri 188.8940046977827 2.3529e-05 deg
M 170.776102734979 1.6656e-05 deg
tp 2457874.205782488676
(2017-Apr-30.70578249)
6.8252e-05 TDB
period 1531.045117652297
4.19
1.16e-05
3.176e-08
d
yr
n .2351335018474332 1.7815e-09 deg/d
Q 2.983088438723472 1.5068e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1415  
   data-arc span      10215 days (27.97 yr)  
   first obs. used      1991-09-12  
   last obs. used      2019-08-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49011  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:23:00  

Additional Information
 Earth MOID = 1.22965 au 
 Jupiter MOID = 2.35485 au 
 T_jup = 3.368 
[ 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 13.4   n/a MPO340842  
diameter diameter 6.028 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.233   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20358 Dalem           Discovered 1998 Apr. 25 by E. W. Elst at the European Southern Observatory.
Henri Dalem (b. 1951) is a specialist in data processing and the webmaster (marquis) of the international Holbach foundation. Also interested in eighteenth-century studies, he currently occupies himself with the origins of despotism.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1998 HD148 = 1991 RO29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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