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305954 (2009 HQ39)
Classification: Main-belt Asteroid          SPK-ID: 2305954
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1485967605467493 4.1856e-08  
a 2.531230443875966 2.0329e-08 au
q 2.155097799718687 1.1178e-07 au
i 2.859503064596037 4.1522e-06 deg
node 145.7222571139309 0.00015863 deg
peri 19.65718409474839 0.0001609 deg
M 320.9129212178368 3.0617e-05 deg
tp 2459160.207998897089
(2020-Nov-06.70799890)
0.00012572 TDB
period 1470.94337551746
4.03
1.772e-05
4.851e-08
d
yr
n .2447408962111519 2.9484e-09 deg/d
Q 2.907363088033244 2.335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      5375 days (14.72 yr)  
   first obs. used      2005-05-14  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57373  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 17:58:31  

Additional Information
 Earth MOID = 1.16274 au 
 Jupiter MOID = 2.06505 au 
 T_jup = 3.433 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457165.5 (2015-May-23.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .148720292051669 4.2118e-08  
q 2.154375444662506 1.1245e-07 au
tp 2457690.996657460577
(2016-Oct-29.49665746)
0.0001206 TDB
node 145.7470803518156 0.00015856 deg
peri 19.98044336499956 0.00016081 deg
i 2.859927700602506 4.1538e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      5375 days (14.72 yr)  
   first obs. used      2005-05-14  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57373  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 17:58:31  

Additional Information
 Jupiter MOID = 2.06505 au 
 T_jup = 3.433 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.773963467096414E-15 -4.684165271634137E-15 1.294452341158988E-12 2.763367227947006E-14 3.743643504205027E-13 1.303726143953352E-16
q -4.684165271634137E-15 1.26451675919926E-14 -2.890529597235776E-12 -6.79516922258503E-14 -8.939503234669241E-13 1.624819223832093E-16
tp 1.294452341158988E-12 -2.890529597235776E-12 1.454550156149767E-8 2.088164877147946E-10 3.333475338208552E-9 4.25876333479091E-12
node 2.763367227947006E-14 -6.79516922258503E-14 2.088164877147946E-10 2.514080200378099E-8 -2.505852141232314E-8 -1.037627314431082E-10
peri 3.743643504205027E-13 -8.939503234669241E-13 3.333475338208552E-9 -2.505852141232314E-8 2.585981365948596E-8 1.046351109120206E-10
i 1.303726143953352E-16 1.624819223832093E-16 4.25876333479091E-12 -1.037627314431082E-10 1.046351109120206E-10 1.725382067951212E-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 16.7   n/a MPO503303  

305954 (2009 HQ39)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2009 HQ39 = 2006 QP86 = 2009 KD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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