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362196 (2009 HE9)
Classification: Main-belt Asteroid          SPK-ID: 2362196
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2707995352267393 7.8811e-08  
a 2.754136655923164 3.0707e-08 au
q 2.008317729548245 2.1426e-07 au
i 11.42719744932774 6.9655e-06 deg
node 143.3959583572365 3.5425e-05 deg
peri 190.72345845 3.7221e-05 deg
M 114.6177345948511 1.125e-05 deg
tp 2458668.972211286095
(2019-Jul-04.47221129)
5.2152e-05 TDB
period 1669.46244936167
4.57
2.792e-05
7.644e-08
d
yr
n .2156382733481957 3.6063e-09 deg/d
Q 3.499955582298083 3.9022e-08 au
  Orbit Determination Parameters
   # obs. used (total)      287  
   data-arc span      6971 days (19.09 yr)  
   first obs. used      2001-12-18  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51451  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 09:38:36  

Additional Information
 Earth MOID = .99722 au 
 Jupiter MOID = 1.88754 au 
 T_jup = 3.262 
[ 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 16.28   n/a MPCxxxxx  
diameter diameter 2.828 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.956 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.073   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

362196 (2009 HE9)          Discovered 2009-Apr-17 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2013-04-29

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