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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1488161711187345 4.2426e-08  
a 2.530775574834434 2.1574e-08 au
q 2.154155243826759 1.1231e-07 au
i 2.85946903508062 4.3627e-06 deg
node 145.731921991844 0.00016003 deg
peri 19.72164007129122 0.00016229 deg
M 222.9511256110811 3.0527e-05 deg
tp 2459160.324435076992
(2020-Nov-06.82443508)
0.00012709 TDB
period 1470.546894502714
4.03
1.8804e-05
5.148e-08
d
yr
n .2448068819469637 3.1304e-09 deg/d
Q 2.907395905842109 2.4785e-08 au
  Orbit Determination Parameters
   # obs. used (total)      227  
   data-arc span      5316 days (14.55 yr)  
   first obs. used      2005-05-14  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59294  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 18:49:37  

Additional Information
 Earth MOID = 1.16226 au 
 Jupiter MOID = 2.06642 au 
 T_jup = 3.434 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456988.5 (2014-Nov-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1485843364911469 4.2637e-08  
q 2.155051243558572 1.1294e-07 au
tp 2457690.955493714554
(2016-Oct-29.45549371)
0.0001215 TDB
node 145.7453070860348 0.00015992 deg
peri 19.94205562987301 0.00016218 deg
i 2.859834574584883 4.3646e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      227  
   data-arc span      5316 days (14.55 yr)  
   first obs. used      2005-05-14  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59294  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 18:49:37  

Additional Information
 Jupiter MOID = 2.06642 au 
 T_jup = 3.434 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.817923088522938E-15 -4.753403363657432E-15 1.381226770165384E-12 2.715312956465841E-14 3.846527346842312E-13 6.935072363678348E-17
q -4.753403363657432E-15 1.275543161735808E-14 -3.024852843851362E-12 -6.674633871594075E-14 -9.099067159165966E-13 3.029403397206882E-16
tp 1.381226770165384E-12 -3.024852843851362E-12 1.476171835555952E-8 1.995193383823335E-10 3.372398784307225E-9 3.514074097872263E-12
node 2.715312956465841E-14 -6.674633871594075E-14 1.995193383823335E-10 2.557587685913669E-8 -2.549543868817952E-8 -7.662728745496215E-11
peri 3.846527346842312E-13 -9.099067159165966E-13 3.372398784307225E-9 -2.549543868817952E-8 2.630293985504396E-8 7.735015928065109E-11
i 6.935072363678348E-17 3.029403397206882E-16 3.514074097872263E-12 -7.662728745496215E-11 7.735015928065109E-11 1.904954381863379E-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 16.6   n/a MPO455254  

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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