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305984 (2009 HN104)
Classification: Main-belt Asteroid          SPK-ID: 2305984
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1901817099612574 5.5873e-08  
a 2.620527592421654 2.325e-08 au
q 2.122151173894247 1.4911e-07 au
i 11.72512979626116 9.5199e-06 deg
node 184.1784456676934 1.9942e-05 deg
peri 314.2553893554339 3.0449e-05 deg
M 293.3776307283736 2.1237e-05 deg
tp 2459287.247146468631
(2021-Mar-13.74714647)
9.2409e-05 TDB
period 1549.464149313448
4.24
2.0621e-05
5.646e-08
d
yr
n .2323383862476021 3.092e-09 deg/d
Q 3.118904010949062 2.7671e-08 au
  Orbit Determination Parameters
   # obs. used (total)      212  
   data-arc span      7709 days (21.11 yr)  
   first obs. used      1998-09-18  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57797  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:41:51  

Additional Information
 Earth MOID = 1.15169 au 
 Jupiter MOID = 1.96322 au 
 T_jup = 3.350 
[ 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 16.7   n/a MPO494624  

305984 (2009 HN104)          Discovered 2009-Apr-28 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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