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JPL Small-Body Database Browser
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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 
[ 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 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

[ 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
1961-Jul-05 09:44 00:02 Iris 0.0495873572385043 0.0495751090284082 0.0495996080472424 6.7852648464499 6.7852648293641 2437485.905872440 1.9198634511372 840.890586046476 124.024744273191 -44.0259453643227 42040.8756334782 T 15 CATAB v2.0f-lin.ifort 2020-Feb-25 17:58:42 2020-Feb-25 17:58
2090-Jul-24 18:14 00:02 Iris 0.0384358446933496 0.0384081045785977 0.0384635860655529 6.67236376467792 6.67236374226198 2484622.259824481 2.46723930127073 1426.24781819184 132.075001071855 -14.1961362098663 11366.6523420205 T 15 CATAB v2.0f-lin.ifort 2020-Feb-25 17:58:42 2020-Feb-25 17:58

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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