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46791 (1998 HW149)
Classification: Main-belt Asteroid          SPK-ID: 2046791
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1095243647188712 3.5397e-08  
a 2.30055714583862 8.9066e-09 au
q 2.048590085941186 8.185e-08 au
i 5.964493845819126 4.5705e-06 deg
node 22.09173370768846 3.9828e-05 deg
peri 205.8492493762173 4.517e-05 deg
M 121.467931422217 2.1668e-05 deg
tp 2458570.461735901754
(2019-Mar-27.96173590)
7.6244e-05 TDB
period 1274.523845616857
3.49
7.4015e-06
2.026e-08
d
yr
n .2824584265237999 1.6403e-09 deg/d
Q 2.552524205736054 9.8821e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1637  
   data-arc span      9800 days (26.83 yr)  
   first obs. used      1992-10-22  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46771  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:12:19  

Additional Information
 Earth MOID = 1.04103 au 
 Jupiter MOID = 2.4304 au 
 T_jup = 3.576 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO432025  
rotation period rot_per 7.186 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.]

46791 (1998 HW149)          Discovered 1998-Apr-25 by Elst, E. W. at La Silla
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HW149 = 1999 TO70 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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