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215781 (2004 HL73)
Classification: Main-belt Asteroid          SPK-ID: 2215781
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1001741217391142 4.5877e-08  
a 2.965137304865234 3.1525e-08 au
q 2.668107279514475 1.4605e-07 au
i 1.902223868361155 6.0313e-06 deg
node 26.57758983000572 0.000157 deg
peri 246.9127131954244 0.00016024 deg
M 15.93202180634903 3.1458e-05 deg
tp 2458917.965783771598
(2020-Mar-09.46578377)
0.00016275 TDB
period 1864.943332577178
5.11
2.9742e-05
8.143e-08
d
yr
n .1930353559335841 3.0785e-09 deg/d
Q 3.262167330215993 3.4684e-08 au
  Orbit Determination Parameters
   # obs. used (total)      267  
   data-arc span      9570 days (26.20 yr)  
   first obs. used      1993-02-26  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59372  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:26:54  

Additional Information
 Earth MOID = 1.65256 au 
 Jupiter MOID = 1.82953 au 
 T_jup = 3.256 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457252.5 (2015-Aug-18.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .098381439859678 4.6082e-08  
q 2.672048280246295 1.459e-07 au
tp 2457058.435490414421
(2015-Feb-04.93549041)
0.00016365 TDB
node 26.66121353760746 0.00015675 deg
peri 247.5237854489338 0.0001601 deg
i 1.904188669374835 6.0348e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      267  
   data-arc span      9570 days (26.20 yr)  
   first obs. used      1993-02-26  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59372  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:26:54  

Additional Information
 Jupiter MOID = 1.82953 au 
 T_jup = 3.256 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.12356491140596E-15 -6.60606752902375E-15 3.337843456044546E-13 -3.591111074590441E-15 1.020583141914429E-13 -5.276631507124715E-16
q -6.60606752902375E-15 2.128775824536749E-14 -1.109746548980366E-12 2.581903432713654E-15 -3.057099676296852E-13 2.095423603922626E-15
tp 3.337843456044546E-13 -1.109746548980366E-12 2.678284726574937E-8 -7.594550189985839E-12 5.355656391663047E-9 -2.738541484635101E-12
node -3.591111074590441E-15 2.581903432713654E-15 -7.594550189985839E-12 2.457015029024417E-8 -2.455849586264741E-8 -1.191742360332641E-10
peri 1.020583141914429E-13 -3.057099676296852E-13 5.355656391663047E-9 -2.455849586264741E-8 2.563127114804394E-8 1.185884849641718E-10
i -5.276631507124715E-16 2.095423603922626E-15 -2.738541484635101E-12 -1.191742360332641E-10 1.185884849641718E-10 3.641926059171691E-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 MPO437031  

215781 (2004 HL73)          Discovered 2004-Apr-28 by Spacewatch at Kitt Peak
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

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