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379763 (2011 HW9)
Classification: Main-belt Asteroid          SPK-ID: 2379763
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .046495640615081 5.7656e-08  
a 2.739304362365275 2.9065e-08 au
q 2.611938651197416 1.6309e-07 au
i 7.660809282671699 4.5365e-06 deg
node 94.2662330844111 4.7454e-05 deg
peri 253.4753583475444 7.0276e-05 deg
M 231.4485518187594 5.3207e-05 deg
tp 2459591.834657492113
(2022-Jan-12.33465749)
0.00024585 TDB
period 1655.994387531342
4.53
2.6356e-05
7.216e-08
d
yr
n .217392041126822 3.46e-09 deg/d
Q 2.866670073533135 3.0417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      213  
   data-arc span      7094 days (19.42 yr)  
   first obs. used      2000-12-20  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:02:00  

Additional Information
 Earth MOID = 1.6163 au 
 Jupiter MOID = 2.34168 au 
 T_jup = 3.336 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457731.5 (2016-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04567170253017511 5.7758e-08  
q 2.614791829209457 1.6333e-07 au
tp 2457938.008362338553
(2017-Jul-03.50836234)
0.00024718 TDB
node 94.27624615325055 4.7455e-05 deg
peri 254.0650565502798 7.0833e-05 deg
i 7.660225737833648 4.5361e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      213  
   data-arc span      7094 days (19.42 yr)  
   first obs. used      2000-12-20  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:02:00  

Additional Information
 Jupiter MOID = 2.34168 au 
 T_jup = 3.336 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.336014859850411E-15 -9.297811147797052E-15 3.99151455907747E-12 3.651013305833418E-15 8.068316978737321E-13 -1.824238479648858E-15
q -9.297811147797052E-15 2.667828392488784E-14 -1.075005248466189E-11 -8.642581765206202E-15 -2.188993888233194E-12 6.405545494385605E-15
tp 3.99151455907747E-12 -1.075005248466189E-11 6.10970315728769E-8 2.492830488761953E-11 1.305703342645243E-8 -4.715994603571054E-12
node 3.651013305833418E-15 -8.642581765206202E-15 2.492830488761953E-11 2.251992673368377E-9 -2.226601251884856E-9 -1.372705735533118E-11
peri 8.068316978737321E-13 -2.188993888233194E-12 1.305703342645243E-8 -2.226601251884856E-9 5.017373205899786E-9 1.257799261330746E-11
i -1.824238479648858E-15 6.405545494385605E-15 -4.715994603571054E-12 -1.372705735533118E-11 1.257799261330746E-11 2.05758791745449E-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 16.2   n/a MPO423398  

379763 (2011 HW9)          Discovered 2008-Oct-08 by CSS at Catalina
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2011 HW9 = 2009 WS43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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