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43909 (1995 WB9)
Classification: Main-belt Asteroid          SPK-ID: 2043909
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1367657293581058 2.5103e-08  
a 2.626588665877916 1.0355e-08 au
q 2.267361351265389 7.0063e-08 au
i 26.31466876732872 6.4458e-07 deg
node 228.7952044252899 3.3051e-06 deg
peri 244.4475155583157 9.3962e-06 deg
M 287.3784809997187 1.1856e-05 deg
tp 2459514.152933414439
(2021-Oct-26.65293341)
5.1834e-05 TDB
period 1554.842938891995
4.26
9.1948e-06
2.517e-08
d
yr
n .2315346399273881 1.3692e-09 deg/d
Q 2.985815980490443 1.1771e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1839  
   data-arc span      9230 days (25.27 yr)  
   first obs. used      1995-11-25  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:23:56  

Additional Information
 Earth MOID = 1.37301 au 
 Jupiter MOID = 2.49771 au 
 T_jup = 3.243 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.80   n/a MPCxxxxx  
diameter diameter 9.840 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43909 (1995 WB9)          Discovered 1995-Nov-28 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WB9 = 1999 TA13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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