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9584 Louchheim (1990 OL4)
Classification: Main-belt Asteroid          SPK-ID: 2009584
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2342294853595231 4.6078e-08  
a 2.420048913517242 1.1868e-08 au
q 1.853202101959226 1.1181e-07 au
i 6.210939519097558 4.4835e-06 deg
node 283.1487052668955 4.4588e-05 deg
peri 67.59122592603346 4.5648e-05 deg
M 195.045155685804 1.356e-05 deg
tp 2459230.582207807245
(2021-Jan-16.08220781)
5.4293e-05 TDB
period 1375.101142095329
3.76
1.0116e-05
2.77e-08
d
yr
n .2617989244423469 1.9258e-09 deg/d
Q 2.986895725075258 1.4648e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1335  
   data-arc span      15966 days (43.71 yr)  
   first obs. used      1975-08-14  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51962  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:02:07  

Additional Information
 Earth MOID = .85684 au 
 Jupiter MOID = 2.47998 au 
 T_jup = 3.468 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO365363  
rotation period rot_per 410. h n/a LCDB (Rev. 2019-January); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2009) http://www.asu.cas.cz/~ppravec/neo.htm]

9584 Louchheim           Discovered 1990 July 25 by H. E. Holt at Palomar.
For many years Thomas Louchheim (b. 1957), of Tucson, Arizona, has been a highly regarded counsellor for hundreds of Tucson-area families. Active in childhood education, Louchheim's optimistic philosophy has brightened the lives of many young people.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1990 OL4 = 1975 PF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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