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312585 (2009 HW82)
Classification: Main-belt Asteroid          SPK-ID: 2312585
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0603925273502675 4.3125e-08  
a 2.375012242614014 1.8753e-08 au
q 2.231579250794727 1.0921e-07 au
i 2.305505587802601 5.3674e-06 deg
node 181.6826786859676 0.00011683 deg
peri 66.34033948346206 0.0001263 deg
M 327.9472925379887 4.626e-05 deg
tp 2459119.530819856527
(2020-Sep-27.03081986)
0.00017166 TDB
period 1336.894713157585
3.66
1.5834e-05
4.335e-08
d
yr
n .2692807417494555 3.1893e-09 deg/d
Q 2.518445234433301 1.9885e-08 au
  Orbit Determination Parameters
   # obs. used (total)      181  
   data-arc span      7540 days (20.64 yr)  
   first obs. used      1999-09-03  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64335  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:27:45  

Additional Information
 Earth MOID = 1.21894 au 
 Jupiter MOID = 2.47852 au 
 T_jup = 3.539 
[ 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 17.5   n/a MPO418616  

312585 (2009 HW82)          Discovered 2009-Apr-26 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ 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
2076-Sep-29 09:05 00:01 Amphi 0.0440894093917556 0.0440640490835599 0.044114787089508 3.50736775746832 3.50736772029276 2479575.878698209 1.06209903800764 1872.51579638745 64.1030455323676 -47.5774798761906 75939.254329729 T 12 CATAB v2.0f-lin.ifort 2020-May-21 20:27:48 2020-May-21 20:27

Alternate Designations
 2009 HW82 = 2007 WP14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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