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305945 (2009 HX16)
Classification: Main-belt Asteroid          SPK-ID: 2305945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .142294830701146 6.1871e-08  
a 2.381779849246203 1.8474e-08 au
q 2.042864888830314 1.398e-07 au
i 3.1487683795173 6.5052e-06 deg
node 148.3899049865854 9.0961e-05 deg
peri 327.2351638789636 9.81e-05 deg
M 75.50671904495582 3.2326e-05 deg
tp 2458718.899157003337
(2019-Aug-23.39915700)
0.00011943 TDB
period 1342.613011941898
3.68
1.5621e-05
4.277e-08
d
yr
n .2681338530149588 3.1197e-09 deg/d
Q 2.720694809662093 2.1103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      206  
   data-arc span      5578 days (15.27 yr)  
   first obs. used      2005-01-18  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:02:01  

Additional Information
 Earth MOID = 1.06 au 
 Jupiter MOID = 2.3648 au 
 T_jup = 3.522 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457436.5 (2016-Feb-18.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1422401552802821 6.1925e-08  
q 2.04350001754398 1.3996e-07 au
tp 2457377.428359241427
(2015-Dec-20.92835924)
0.00011521 TDB
node 148.404877607672 9.0927e-05 deg
peri 327.6360330599273 9.8049e-05 deg
i 3.14883952614739 6.5067e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      206  
   data-arc span      5578 days (15.27 yr)  
   first obs. used      2005-01-18  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:02:01  

Additional Information
 Jupiter MOID = 2.3648 au 
 T_jup = 3.522 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.834670111922384E-15 -8.626939653728957E-15 4.291125734578315E-13 -3.967603646763393E-14 5.197554030412557E-14 -5.606794163574146E-15
q -8.626939653728957E-15 1.958992171802627E-14 -6.815057217009475E-13 9.126532162972592E-14 -2.475988647298115E-14 1.278792547539148E-14
tp 4.291125734578315E-13 -6.815057217009475E-13 1.327382379040951E-8 6.288686719611189E-11 4.241693730209464E-9 -3.610163691155657E-12
node -3.967603646763393E-14 9.126532162972592E-14 6.288686719611189E-11 8.267743114623298E-9 -8.232593702054906E-9 6.766431464505537E-11
peri 5.197554030412557E-14 -2.475988647298115E-14 4.241693730209464E-9 -8.232593702054906E-9 9.613598514156938E-9 -6.852414950789206E-11
i -5.606794163574146E-15 1.278792547539148E-14 -3.610163691155657E-12 6.766431464505537E-11 -6.852414950789206E-11 4.233740483743515E-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 17.6   n/a MPO455254  

305945 (2009 HX16)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 HX16 = 2005 CS16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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