Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09749714124305918 5.2291e-08  
a 2.460216897772233 1.0165e-08 au
q 2.220352783401573 1.2609e-07 au
i 8.444733227557618 3.8048e-06 deg
node 51.23779788955811 2.6611e-05 deg
peri 309.631537862744 3.0831e-05 deg
M 282.5999965873919 1.6882e-05 deg
tp 2459699.537937548434
(2022-Apr-30.03793755)
6.6759e-05 TDB
period 1409.478717150359
3.86
8.735e-06
2.392e-08
d
yr
n .2554135763949931 1.5829e-09 deg/d
Q 2.700081012142894 1.1156e-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 = 1.22862 au 
 Jupiter MOID = 2.70611 au 
 T_jup = 3.469 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456840.5 (2014-Jul-02.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09672648970311726 5.2252e-08  
q 2.222626979326305 1.2571e-07 au
tp 2456876.742259517541
(2014-Aug-07.24225952)
6.308e-05 TDB
node 51.32574018494324 2.6644e-05 deg
peri 308.7845119912616 3.0929e-05 deg
i 8.439443363683536 3.801e-06 deg
  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
 Jupiter MOID = 2.70611 au 
 T_jup = 3.469 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.730306276313723E-15 -6.552364712493599E-15 4.634353994719985E-13 -1.989730519751631E-14 4.204121810442658E-14 3.788699530522589E-15
q -6.552364712493599E-15 1.580291558914155E-14 -1.069323627379936E-12 4.725047675791472E-14 -9.138029276598128E-14 -8.95641133268399E-15
tp 4.634353994719985E-13 -1.069323627379936E-12 3.979107222223215E-9 -1.708985152367533E-12 1.004919072921896E-9 -1.60841584915259E-12
node -1.989730519751631E-14 4.725047675791472E-14 -1.708985152367533E-12 7.098832740522289E-10 -7.016330141682194E-10 -3.53529022022133E-11
peri 4.204121810442658E-14 -9.138029276598128E-14 1.004919072921896E-9 -7.016330141682194E-10 9.5663238525004E-10 3.442355808980062E-11
i 3.788699530522589E-15 -8.95641133268399E-15 -1.60841584915259E-12 -3.53529022022133E-11 3.442355808980062E-11 1.444749553671518E-11

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-29 20:18 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin