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523815 (2009 HW44)
Classification: Amor [NEO]          SPK-ID: 2523815
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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5923361029108569 1.5869e-07  
a 2.687129991529267 1.3124e-07 au
q 1.095445884331937 3.7953e-07 au
i 41.08139437557967 2.7649e-05 deg
node 37.86068761370219 8.2867e-06 deg
peri 296.5698705482359 4.1444e-05 deg
M 141.8873642830628 8.6029e-06 deg
tp 2458366.378232202340
(2018-Sep-04.87823220)
3.859e-05 TDB
period 1608.908852177529
4.40
0.00011787
3.227e-07
d
yr
n .2237541297089445 1.6393e-08 deg/d
Q 4.278814098726596 2.0898e-07 au
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      3544 days (9.70 yr)  
   first obs. used      2009-04-22  
   last obs. used      2019-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31988  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:22:25  

Additional Information
 Earth MOID = .318524 au 
 Jupiter MOID = 2.42149 au 
 T_jup = 2.809 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457849.5 (2017-Apr-06.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5931082577535527 1.5791e-07  
q 1.093406280873856 3.7964e-07 au
tp 2458365.878909126471
(2018-Sep-04.37890913)
3.7843e-05 TDB
node 37.90119737517242 8.3022e-06 deg
peri 296.5878054061187 4.1284e-05 deg
i 41.07068968643368 2.7658e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      3544 days (9.70 yr)  
   first obs. used      2009-04-22  
   last obs. used      2019-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31988  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:22:25  

Additional Information
 Jupiter MOID = 2.42149 au 
 T_jup = 2.809 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.493698609705322E-14 -5.98355009444799E-14 -1.794846954323902E-12 1.290270485734967E-13 -4.96523704992657E-12 -1.522342982926262E-13
q -5.98355009444799E-14 1.441247352537577E-13 3.685818971663334E-12 -3.713177987564361E-13 1.146333241585502E-11 4.768540538207861E-13
tp -1.794846954323902E-12 3.685818971663334E-12 1.432101683742769E-9 1.170653768472301E-10 1.285340859021057E-9 -2.84845207676435E-10
node 1.290270485734967E-13 -3.713177987564361E-13 1.170653768472301E-10 6.892662776925476E-11 2.392629056839569E-11 -5.289759759828605E-11
peri -4.96523704992657E-12 1.146333241585502E-11 1.285340859021057E-9 2.392629056839569E-11 1.70433887258784E-9 -1.762190248196365E-10
i -1.522342982926262E-13 4.768540538207861E-13 -2.84845207676435E-10 -5.289759759828605E-11 -1.762190248196365E-10 7.649443627055655E-10

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 17.5   n/a MPO159141  
rotation period rot_per 6.85 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 144-152.]

523815 (2009 HW44)          Discovered 2009-Apr-22 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2018-10-30

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