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23818 Matthewlepow (1998 QZ50)
Classification: Main-belt Asteroid          SPK-ID: 2023818
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1733032363342439 6.5501e-08  
a 2.770843146907116 2.1694e-08 AU
q 2.290647062173552 1.8143e-07 AU
i 5.732726461781019 6.3001e-06 deg
node 146.166767532112 5.7166e-05 deg
peri 217.9252395022348 5.8898e-05 deg
M 175.8432142606538 1.6615e-05 deg
tp 2456177.614419137174
(2012-Sep-07.11441914)
7.3696e-05 JED
period 1684.675808254393
4.61
1.9785e-05
5.417e-08
d
yr
n .2136909654879062 2.5096e-09 deg/d
Q 3.25103923164068 2.5454e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      838  
   data-arc span      11783 days (32.26 yr)  
   first obs. used      1983-05-07  
   last obs. used      2015-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56997  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 15:02:44  

Additional Information
 Earth MOID = 1.29142 AU 
 T_jup = 3.308 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4 mag n/a MPO296325  
rotation period rot_per 6.5335 h n/a LCDB (Rev. 2015-July); 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., in press.]

23818 Matthewlepow           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Matthew Brice Lepow (b. 1993) is a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his earth and space science project. He attends the Southfield School, Shreveport, Louisiana.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071026/MPCPages.arcLast Updated: 2007-10-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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