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27556 Williamprem (2000 JO54)
Classification: Main-belt Asteroid          SPK-ID: 2027556
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05156280605758116 5.0109e-08  
a 2.475922217429581 1.5695e-08 au
q 2.348256720318604 1.242e-07 au
i 4.381627220974635 5.4067e-06 deg
node 94.78380020914945 8.7313e-05 deg
peri 359.9625547964488 0.00012365 deg
M 137.8016884310426 8.6267e-05 deg
tp 2456855.801774601788
(2014-Jul-17.30177460)
0.00034139 JED
period 1422.99679616395
3.90
1.353e-05
3.704e-08
d
yr
n .2529872175190216 2.4055e-09 deg/d
Q 2.603587714540559 1.6504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      8966 days (24.55 yr)  
   first obs. used      1990-12-18  
   last obs. used      2015-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53624  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 15:11:02  

Additional Information
 Earth MOID = 1.36463 au 
 Jupiter MOID = 2.47839 au 
 T_jup = 3.475 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1 mag n/a MPO337491  
rotation period rot_per 81.3622 h n/a LCDB (Rev. 2015-December); 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. 150, A75.]

27556 Williamprem           Discovered 2000 May 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
William Prem mentored a finalist in the 2011 Broadcom MASTERS, a math and science competition for middle-school students. He teaches at the Central Middle School, Eden Prairie, Minnesota.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111210/MPCPages.arcLast Updated: 2011-12-12

Alternate Designations
 2000 JO54 = 1996 LP4 = 1999 BF21 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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