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43908 Hiraku (1995 WE7)
Classification: Main-belt Asteroid          SPK-ID: 2043908
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09742270029475299 5.2273e-08  
a 2.459856324735065 1.0339e-08 au
q 2.220210479242248 1.2583e-07 au
i 8.445278442020792 3.8049e-06 deg
node 51.23982466883654 2.661e-05 deg
peri 309.7288179248296 3.0833e-05 deg
M 232.4198123444163 1.6768e-05 deg
tp 2459699.894523076394
(2022-Apr-30.39452308)
6.6716e-05 TDB
period 1409.168865567454
3.86
8.8844e-06
2.432e-08
d
yr
n .2554697373724849 1.6107e-09 deg/d
Q 2.699502170227882 1.1346e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1533  
   data-arc span      10428 days (28.55 yr)  
   first obs. used      1991-11-06  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50854  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:23:54  

Additional Information
 Earth MOID = 1.22774 au 
 Jupiter MOID = 2.70784 au 
 T_jup = 3.469 
[ 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 14.75   n/a E2021B10  
diameter diameter 3.099 km 0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.384   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43908 Hiraku           Discovered 1995 Nov. 21 by T. Okuni at Nanyo.
Hiraku Togashi (b. 1955) became a member of the Yamagata Astronomical Society in 1998 and actively popularizes astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-04-25Last Updated: 2013-04-29

Alternate Designations
 1995 WE7 = 1999 XT190 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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