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216457 (2009 HG57)
Classification: Main-belt Asteroid          SPK-ID: 2216457
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1668434404428034 3.2353e-08  
a 2.351645065763464 1.2817e-08 au
q 1.959288512291145 7.9136e-08 au
i 5.80638516993115 5.0146e-06 deg
node 45.20206720363444 3.8722e-05 deg
peri 246.7634468186855 4.2342e-05 deg
M 20.62300083058689 1.5389e-05 deg
tp 2459125.041972800163
(2020-Oct-02.54197280)
5.6333e-05 TDB
period 1317.213242393512
3.61
1.0769e-05
2.948e-08
d
yr
n .2733042672315099 2.2344e-09 deg/d
Q 2.744001619235783 1.4956e-08 au
  Orbit Determination Parameters
   # obs. used (total)      275  
   data-arc span      7561 days (20.70 yr)  
   first obs. used      1999-10-09  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50507  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:53  

Additional Information
 Earth MOID = .950078 au 
 Jupiter MOID = 2.44264 au 
 T_jup = 3.532 
[ 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 17.02   n/a E2021B55  

216457 (2009 HG57)          Discovered 2009-Apr-20 by La Sagra at La Sagra
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

[ show close-approach data ]
Alternate Designations
 2009 HG57 = 2006 QX59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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