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27284 Billdunbar (2000 AJ97)
Classification: Main-belt Asteroid          SPK-ID: 2027284
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1423489857153221 4.1508e-08  
a 2.450027397215786 9.1333e-09 au
q 2.101268482247368 1.0408e-07 au
i 3.267681331926229 4.0842e-06 deg
node 102.4981524876451 7.673e-05 deg
peri 93.82533544190147 7.8203e-05 deg
M 74.94297136718933 1.6646e-05 deg
tp 2458708.902869758131
(2019-Aug-13.40286976)
6.4013e-05 TDB
period 1400.731315719247
3.83
7.8325e-06
2.144e-08
d
yr
n .2570086039770927 1.4371e-09 deg/d
Q 2.798786312184204 1.0433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1643  
   data-arc span      10413 days (28.51 yr)  
   first obs. used      1991-12-14  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 19:33:16  

Additional Information
 Earth MOID = 1.10279 au 
 Jupiter MOID = 2.15999 au 
 T_jup = 3.480 
[ 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 14.6   n/a MPO474123  

27284 Billdunbar           Discovered 2000 Jan. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Bill Dunbar mentored a finalist in the 2011 Intel Science Talent Search (STS), a science competition for high-school seniors. He teaches at the Henry M. Gunn Senior High School, Palo Alto, California, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110319/MPCPages.arcLast Updated: 2011-03-23

Alternate Designations
 2000 AJ97 = 1998 VZ15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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