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266677 (2009 HG71)
Classification: Main-belt Asteroid          SPK-ID: 2266677
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1737207536132746 4.5273e-08  
a 2.264407000787152 1.3278e-08 au
q 1.871032510123233 1.0017e-07 au
i 4.031052300714119 7.4785e-06 deg
node 194.975037342167 6.1942e-05 deg
peri 110.7211529603483 6.5413e-05 deg
M 23.76424351423858 2.1412e-05 deg
tp 2458918.341660446963
(2020-Mar-09.84166045)
7.3721e-05 TDB
period 1244.60104195498
3.41
1.0947e-05
2.997e-08
d
yr
n .2892493159370358 2.5441e-09 deg/d
Q 2.65778149145107 1.5585e-08 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      6225 days (17.04 yr)  
   first obs. used      2003-10-21  
   last obs. used      2020-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55579  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 05:54:22  

Additional Information
 Earth MOID = .860838 au 
 Jupiter MOID = 2.58569 au 
 T_jup = 3.594 
[ 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 17.8   n/a MPO433731  

266677 (2009 HG71)          Discovered 2009-Apr-22 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ 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
2107-Feb-24 09:12 00:02 Eunom 0.0411104057971075 0.0410936065053232 0.0411272100834307 5.41685613876469 5.4168560757278 2490679.883024112 2.24227383459752 1101.88301019138 65.3222645044803 40.6308930625022 61418.1000423098 T 12 CATAB v2.0f-lin.ifort 2020-Dec-18 05:54:22 2020-Dec-18 05:54
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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