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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05150771348915201 5.0967e-08  
a 2.477341859268106 1.5869e-08 AU
q 2.349739644566241 1.2686e-07 AU
i 4.382072280814664 5.4492e-06 deg
node 94.80460837832017 8.7444e-05 deg
peri .6902522098522911 0.00012378 deg
M 35.91328616255232 8.6334e-05 deg
tp 2456858.420969963906
(2014-Jul-19.92096996)
0.0003417 JED
period 1424.220846332003
3.90
1.3685e-05
3.747e-08
d
yr
n .2527697870222578 2.4287e-09 deg/d
Q 2.604944073969971 1.6686e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      8948 days (24.50 yr)  
   first obs. used      1990-12-18  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53671  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:40:58  

Additional Information
 Earth MOID = 1.36628 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-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.]

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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