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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1094090680350493 3.5361e-08  
a 2.300704303921715 7.8113e-09 au
q 2.048986390205413 8.1671e-08 au
i 5.964255555147606 4.3316e-06 deg
node 22.09147160620339 3.0308e-05 deg
peri 205.8211001210712 3.5099e-05 deg
M 177.9979583880813 1.9979e-05 deg
tp 2458570.265527433724
(2019-Mar-27.76552743)
6.917e-05 TDB
period 1274.646137396661
3.49
6.4915e-06
1.777e-08
d
yr
n .2824313269683337 1.4384e-09 deg/d
Q 2.552422217638016 8.666e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1918  
   data-arc span      10333 days (28.29 yr)  
   first obs. used      1992-10-22  
   last obs. used      2021-02-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45437  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:52:25  

Additional Information
 Earth MOID = 1.04022 au 
 Jupiter MOID = 2.4293 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 14.87   n/a E2021B10  
rotation period rot_per 7.186 h n/a LCDB (Rev. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

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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