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38454 Boroson (1999 TB2)
Classification: Main-belt Asteroid          SPK-ID: 2038454
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1949143710968994 4.32e-08  
a 2.629225657386543 1.3141e-08 au
q 2.116751791905213 1.158e-07 au
i 13.79114442858649 3.5238e-06 deg
node 93.3849563049647 1.9846e-05 deg
peri 271.732222119849 2.1244e-05 deg
M 308.8602730374298 9.2371e-06 deg
tp 2459221.705603233895
(2021-Jan-07.20560323)
4.058e-05 TDB
period 1557.185028040674
4.26
1.1674e-05
3.196e-08
d
yr
n .231186399507687 1.7332e-09 deg/d
Q 3.141699522867873 1.5702e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1778  
   data-arc span      8083 days (22.13 yr)  
   first obs. used      1998-05-01  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 20:54:08  

Additional Information
 Earth MOID = 1.16848 au 
 Jupiter MOID = 2.48283 au 
 T_jup = 3.333 
[ 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 13.3   n/a MPO337570  
rotation period rot_per 138.816 h n/a LCDB (Rev. 2019-August); 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.]

38454 Boroson           Discovered 1999 Oct. 2 by C. W. Juels at Fountain Hills.
Todd A. Boroson (b. 1954) studies the spectra of Active Galactic Nuclei. He is the deputy director of the National Optical Astronomy Observatory in Tucson, Arizona, and also leads the NOAO Data Products and the Telescope System Instrumentation programs.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

Alternate Designations
 1999 TB2 = 1998 JP4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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