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305960 (2009 HT45)
Classification: Main-belt Asteroid          SPK-ID: 2305960
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371508801751113 6.5275e-08  
a 3.120970559800652 6.9434e-08 au
q 2.692926700523383 2.0692e-07 au
i 16.89506932176433 1.0291e-05 deg
node 30.29040839778964 2.5706e-05 deg
peri 273.0340687054715 4.8422e-05 deg
M 213.3903203950581 3.8636e-05 deg
tp 2459420.649602459416
(2021-Jul-25.14960246)
0.00022369 TDB
period 2013.87696693007
5.51
6.7206e-05
1.84e-07
d
yr
n .1787596789235738 5.9655e-09 deg/d
Q 3.549014419077922 7.8957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      126  
   data-arc span      4920 days (13.47 yr)  
   first obs. used      2005-09-13  
   last obs. used      2019-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64712  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:11:00  

Additional Information
 Earth MOID = 1.74575 au 
 Jupiter MOID = 1.86928 au 
 T_jup = 3.135 
[ 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 15.5   n/a MPO397068  
diameter diameter 4.762 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

305960 (2009 HT45)          Discovered 2009-Apr-21 by La Sagra at La Sagra
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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