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15887 Daveclark (1997 ER26)
Classification: Main-belt Asteroid          SPK-ID: 2015887
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2059120360039201 4.1849e-08  
a 3.062322764648479 1.6243e-08 au
q 2.431753649278557 1.3467e-07 au
i 1.887323283417828 4.0429e-06 deg
node 167.1610801044827 0.00011287 deg
peri 192.0793775886222 0.00011318 deg
M 307.6837981508776 9.1081e-06 deg
tp 2459284.951728443841
(2021-Mar-11.45172844)
5.0566e-05 TDB
period 1957.378758785041
5.36
1.5574e-05
4.264e-08
d
yr
n .1839194373517441 1.4633e-09 deg/d
Q 3.692891880018401 1.9588e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1557  
   data-arc span      15256 days (41.77 yr)  
   first obs. used      1978-10-30  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51133  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:02:47  

Additional Information
 Earth MOID = 1.42833 au 
 Jupiter MOID = 1.76069 au 
 T_jup = 3.200 
[ 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 13.9   n/a MPO299077  
diameter diameter 7.659 km 0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.076   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15887 Daveclark           Discovered 1997 Mar. 4 by Spacewatch at Kitt Peak.
David Leslie Clark (b. 1956) is an amateur astronomer active in the Royal Astronomical Society of Canada, London Centre, particularly in educational activities. He created ClearSky, a planetarium software package. The name was suggested by R. Jedicke and P. Jedicke.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050523/MPCPages.arcLast Updated: 2005-07-21

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Alternate Designations
 1997 ER26 = 1978 UD2 = 1994 TE14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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