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24138 Benjaminlu (1999 VB81)
Classification: Main-belt Asteroid          SPK-ID: 2024138
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08798393761916021 3.1179e-08  
a 2.281838749578671 7.6266e-09 au
q 2.081073591378758 6.9745e-08 au
i 6.391678463759233 4.298e-06 deg
node 186.7945718322703 3.2324e-05 deg
peri 74.8687355717109 4.1595e-05 deg
M 189.1632917207802 2.5565e-05 deg
tp 2459797.954101993640
(2022-Aug-06.45410199)
8.9404e-05 TDB
period 1259.000357032005
3.45
6.312e-06
1.728e-08
d
yr
n .2859411421047344 1.4336e-09 deg/d
Q 2.482603907778583 8.2976e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1393  
   data-arc span      10903 days (29.85 yr)  
   first obs. used      1991-05-13  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52655  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:32:04  

Additional Information
 Earth MOID = 1.07537 au 
 Jupiter MOID = 2.55711 au 
 T_jup = 3.591 
[ 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 15.19   n/a MPCxxxxx  
rotation period rot_per 1.97 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

24138 Benjaminlu           Discovered 1999 Nov. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team in Socorro.
Benjamin Brice Lu (b. 1990) is a finalist in the 2008 Intel Science Talent Search (STS), a science competition for high school seniors, for his zoology project. He attends the Richard Montgomery High School, Rockville, Maryland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080221/MPCPages.arcLast Updated: 2008-03-05

Alternate Designations
 1999 VB81 = 1991 JN4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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