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23809 Haswell (1998 QC44)
Classification: Main-belt Asteroid          SPK-ID: 2023809
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1092170160974916 7.4748e-08  
a 2.406543384395612 2.2515e-08 AU
q 2.143707896842764 1.8149e-07 AU
i 6.899746730871598 9.0848e-06 deg
node 7.44399893168517 4.7953e-05 deg
peri 229.757682877155 6.3495e-05 deg
M 166.5822837120949 4.3185e-05 deg
tp 2456169.520454624961
(2012-Aug-30.02045463)
0.00016451 JED
period 1363.606208734678
3.73
1.9137e-05
5.239e-08
d
yr
n .2640058381180681 3.705e-09 deg/d
Q 2.66937887194846 2.4974e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      781  
   data-arc span      8094 days (22.16 yr)  
   first obs. used      1991-11-07  
   last obs. used      2014-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55513  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jan-22 07:36:15  

Additional Information
 Earth MOID = 1.14029 AU 
 T_jup = 3.504 
[ 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 14.5 mag n/a MPO267795  
rotation period rot_per 3.59 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]

23809 Haswell           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
John Douglas Reiji Haswell (b. 1993) is a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his biochem, medicine, health, and microbiology project. He attends the Hilo Intermediate School, Hilo, Hawaii.
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 ]
Alternate Designations
 1998 QC44 = 1999 XE191 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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