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146042 (2000 ET4)
Classification: Main-belt Asteroid          SPK-ID: 2146042
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2008076235225662 3.5167e-08  
a 2.434785215370165 1.0332e-08 au
q 1.945861782483802 8.8459e-08 au
i .8708727890086733 4.4273e-06 deg
node 1.183809932782824 0.00028166 deg
peri 333.9242687551992 0.00028191 deg
M 292.7425320544933 1.2631e-05 deg
tp 2459259.755168568438
(2021-Feb-14.25516857)
4.9107e-05 TDB
period 1387.68026117571
3.80
8.8325e-06
2.418e-08
d
yr
n .2594257553933862 1.6512e-09 deg/d
Q 2.923708648256527 1.2406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      9394 days (25.72 yr)  
   first obs. used      1994-09-28  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53179  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 02:46:03  

Additional Information
 Earth MOID = .936103 au 
 Jupiter MOID = 2.45129 au 
 T_jup = 3.477 
[ 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 16.2   n/a MPO436733  
rotation period rot_per 8.66 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:
[Warner, B.D. (2018) Minor Planet Bull. 45, 190-195.]

146042 (2000 ET4)          Discovered 2000-Mar-02 by Spacewatch at Kitt Peak
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

Alternate Designations
 2000 ET4 = 1994 TA6 = 1998 VA23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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