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243462 (2009 ST42)
Classification: Main-belt Asteroid          SPK-ID: 2243462
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685000642329045 5.2397e-08  
a 3.053170780387669 4.2919e-08 au
q 2.53871130777832 1.7534e-07 au
i 4.031892527108628 7.9394e-06 deg
node 295.7320977653395 9.005e-05 deg
peri 98.98962304507261 9.6778e-05 deg
M 350.4775468792013 3.422e-05 deg
tp 2459052.043204487602
(2020-Jul-21.54320449)
0.00018581 TDB
period 1948.610655274116
5.34
4.1088e-05
1.125e-07
d
yr
n .1847470139946237 3.8956e-09 deg/d
Q 3.567630252997019 5.0151e-08 au
  Orbit Determination Parameters
   # obs. used (total)      174  
   data-arc span      8962 days (24.54 yr)  
   first obs. used      1995-02-07  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59146  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:15:48  

Additional Information
 Earth MOID = 1.54934 au 
 Jupiter MOID = 1.89602 au 
 T_jup = 3.211 
[ 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 16.2   n/a MPO454786  
diameter diameter 2.709 km 0.809 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243462 (2009 ST42)          Discovered 2009-Sep-16 by Spacewatch at Kitt Peak
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

[ show close-approach data ]
Alternate Designations
 2009 ST42 = 2004 XF182 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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