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JPL Small-Body Database Browser
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359284 (2009 HM20)
Classification: Main-belt Asteroid          SPK-ID: 2359284
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326495671276148 5.5419e-08  
a 2.619803030330734 2.9064e-08 au
q 2.272287292397749 1.4328e-07 au
i 14.28821967063235 5.721e-06 deg
node 76.85653608577219 2.0842e-05 deg
peri 124.0306335426336 2.7723e-05 deg
M 145.9437314751737 2.2147e-05 deg
tp 2457972.608892530902
(2017-Aug-07.10889253)
9.0369e-05 TDB
period 1548.821565709567
4.24
2.5774e-05
7.057e-08
d
yr
n .2324347800742766 3.868e-09 deg/d
Q 2.96731876826372 3.292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      4347 days (11.90 yr)  
   first obs. used      2007-12-20  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53956  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 23:25:08  

Additional Information
 Earth MOID = 1.29833 au 
 Jupiter MOID = 2.09427 au 
 T_jup = 3.349 
[ 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 16.1   n/a MPO455593  

359284 (2009 HM20)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2172-Dec-06 17:47 00:35 Europ 0.0337029376781064 0.0335391023876663 0.0338668388606294 3.64691899738383 3.64691891091137 2514707.240746775 34.9892577515389 8495.71760374223 113.712881628345 16.0439573590577 12256.368238549 T 16 CATAB v2.0f-lin.ifort 2019-Dec-04 23:25:10 2019-Dec-04 23:25

Alternate Designations
 2009 HM20 = 2011 UL369 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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