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108196 (2001 HW20)
Classification: Main-belt Asteroid          SPK-ID: 2108196
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1307228345009546 4.4934e-08  
a 2.642277272654152 1.3509e-08 au
q 2.29687129803535 1.1695e-07 au
i 5.488067874352524 5.0887e-06 deg
node 42.16438441722926 4.3294e-05 deg
peri 186.2060298984219 4.6664e-05 deg
M 161.4319004855629 1.6825e-05 deg
tp 2458297.018194481403
(2018-Jun-27.51819448)
7.2639e-05 TDB
period 1568.794328908639
4.30
1.2031e-05
3.294e-08
d
yr
n .2294755873132462 1.7599e-09 deg/d
Q 2.987683247272955 1.5275e-08 au
  Orbit Determination Parameters
   # obs. used (total)      666  
   data-arc span      6736 days (18.44 yr)  
   first obs. used      2001-04-21  
   last obs. used      2019-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55172  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 12:43:06  

Additional Information
 Earth MOID = 1.28706 au 
 Jupiter MOID = 1.99603 au 
 T_jup = 3.376 
[ 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 15.2   n/a MPO348158  
rotation period rot_per 2.737 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:
[Molnar, L.; Pal, A.; Sarneczky, K.; Szabo, R.; et al. (2017) ArXiv:170606056v1]

108196 (2001 HW20)          Discovered 2001-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 HW20 = 2002 RS216 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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