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305974 (2009 HS85)
Classification: Main-belt Asteroid          SPK-ID: 2305974
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304248540956029 1.4597e-07  
a 2.627089032282121 4.6679e-08 au
q 2.284451328550567 4.1483e-07 au
i 8.936145269330147 8.9375e-06 deg
node 188.5570808432659 3.6357e-05 deg
peri 336.891807296326 4.278e-05 deg
M 300.3351995683494 2.5636e-05 deg
tp 2459458.266399542138
(2021-Aug-31.76639954)		 0.0001151 TDB
period 1555.287257542622
4.26		 4.1453e-05
1.135e-07		 d
yr
n .2314684944881537 6.1693e-09 deg/d
Q 2.969726736013675 5.2768e-08 au
   Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      6673 days (18.27 yr)  
   first obs. used      2002-10-05  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57098  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:57:11  

Additional Information
 Earth MOID = 1.29343 au 
 Jupiter MOID = 2.01116 au 
 T_jup = 3.373 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457045.5 (2015-Jan-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1296752863189689 1.4688e-07  
q 2.286741920020213 4.1729e-07 au
tp 2456349.697476882005
(2013-Feb-26.19747688)		 8.7866e-05 TDB
node 188.589658238985 3.6327e-05 deg
peri 337.2872863628144 4.2688e-05 deg
i 8.938329040613144 8.942e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      6673 days (18.27 yr)  
   first obs. used      2002-10-05  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57098  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:57:11  

Additional Information
 Jupiter MOID = 2.01116 au 
 T_jup = 3.373 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.157353014690897E-14 -6.116408392625349E-14 2.630531297267028E-12 -1.25979125948483E-13 9.498203794365696E-13 -8.531509320879192E-14
q -6.116408392625349E-14 1.741335307702085E-13 -7.192983127607218E-12 3.563133904019676E-13 -2.558194262617028E-12 2.44802239938259E-13
tp 2.630531297267028E-12 -7.192983127607218E-12 7.720360361631328E-9 -1.876525109107745E-11 1.974208165002984E-9 -3.567172886669217E-12
node -1.25979125948483E-13 3.563133904019676E-13 -1.876525109107745E-11 1.319660796618424E-9 -1.308835903577193E-9 -1.000278070110865E-10
peri 9.498203794365696E-13 -2.558194262617028E-12 1.974208165002984E-9 -1.308835903577193E-9 1.822261891753639E-9 9.773425939146862E-11
i -8.531509320879192E-14 2.44802239938259E-13 -3.567172886669217E-12 -1.000278070110865E-10 9.773425939146862E-11 7.996007889763159E-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 16.8   n/a MPO494624  

305974 (2009 HS85)          Discovered 2009-Apr-29 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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