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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304248574166042 1.4597e-07  
a 2.627089028587295 4.6679e-08 au
q 2.284451316613072 4.1483e-07 au
i 8.936145259801146 8.9375e-06 deg
node 188.5570808868474 3.6357e-05 deg
peri 336.8918077541097 4.278e-05 deg
M 300.3351993825082 2.5636e-05 deg
tp 2459458.266399801220
(2021-Aug-31.76639980)
0.0001151 TDB
period 1555.28725426151
4.26
4.1453e-05
1.135e-07
d
yr
n .2314684949764712 6.1693e-09 deg/d
Q 2.969726740561518 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57088  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 20:16:42  

Additional Information
 Earth MOID = 1.29343 au 
 Jupiter MOID = 2.01116 au 
 T_jup = 3.373 
[ show covariance matrix ]

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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