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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1307228166558041 4.4619e-08  
a 2.642277283461667 1.34e-08 au
q 2.296871354581912 1.1592e-07 au
i 5.488067203405437 5.0339e-06 deg
node 42.16439183862372 4.2874e-05 deg
peri 186.20602835 4.621e-05 deg
M 161.4318950631815 1.6726e-05 deg
tp 2458297.018213794750
(2018-Jun-27.51821380)
7.2191e-05 TDB
period 1568.794338533728
4.30
1.1934e-05
3.267e-08
d
yr
n .2294755859053352 1.7457e-09 deg/d
Q 2.987683212341423 1.5152e-08 au
  Orbit Determination Parameters
   # obs. used (total)      684  
   data-arc span      6805 days (18.63 yr)  
   first obs. used      2001-04-21  
   last obs. used      2019-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55159  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:04:05  

Additional Information
 Earth MOID = 1.28706 au 
 Jupiter MOID = 1.99603 au 
 T_jup = 3.376 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457085.5 (2015-Mar-04.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1302640816337674 4.4528e-08  
q 2.298937398288722 1.1563e-07 au
tp 2456729.345308308604
(2014-Mar-12.84530831)
7.2941e-05 TDB
node 42.18021210325175 4.2857e-05 deg
peri 186.60200283756 4.625e-05 deg
i 5.489187088881793 5.035e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      684  
   data-arc span      6805 days (18.63 yr)  
   first obs. used      2001-04-21  
   last obs. used      2019-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55159  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:04:05  

Additional Information
 Jupiter MOID = 1.99603 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.98273319097112E-15 -5.12341420117851E-15 -1.362721157069688E-12 2.575830973913761E-16 -3.569691984312521E-13 4.785915305900091E-16
q -5.12341420117851E-15 1.336999965870447E-14 3.525556719783133E-12 -3.636815943846191E-15 9.325757951660004E-13 -1.006856832763358E-15
tp -1.362721157069688E-12 3.525556719783133E-12 5.320428254428022E-9 1.498019653812298E-13 1.282399126799203E-9 -1.141108750531199E-12
node 2.575830973913761E-16 -3.636815943846191E-15 1.498019653812298E-13 1.836714730602702E-9 -1.828414847644156E-9 -8.111533212641397E-11
peri -3.569691984312521E-13 9.325757951660004E-13 1.282399126799203E-9 -1.828414847644156E-9 2.139051219719739E-9 8.051224576478021E-11
i 4.785915305900091E-16 -1.006856832763358E-15 -1.141108750531199E-12 -8.111533212641397E-11 8.051224576478021E-11 2.535162277264549E-11

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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