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10540 Hachigoroh (1991 VP4)
Classification: Main-belt Asteroid          SPK-ID: 2010540
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1695649445095759 3.8159e-08  
a 3.102297173465651 1.511e-08 au
q 2.576256325394734 1.1725e-07 au
i 6.735503493078814 4.367e-06 deg
node 110.644498185674 3.8554e-05 deg
peri 309.5488964368368 4.2007e-05 deg
M 75.55178363180075 1.5127e-05 deg
tp 2458581.643033122500
(2019-Apr-08.14303312)
8.3735e-05 TDB
period 1995.829890803942
5.46
1.4582e-05
3.992e-08
d
yr
n .180376094004178 1.3178e-09 deg/d
Q 3.628338021536569 1.7672e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1694  
   data-arc span      14422 days (39.49 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47972  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:05:40  

Additional Information
 Earth MOID = 1.59566 au 
 Jupiter MOID = 1.72158 au 
 T_jup = 3.189 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457030.5 (2015-Jan-08.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1686085295557635 3.7868e-08  
q 2.581263067794695 1.163e-07 au
tp 2456589.730919956662
(2013-Oct-24.23091996)
8.5582e-05 TDB
node 110.6862152895059 3.8527e-05 deg
peri 310.2428466718074 4.2022e-05 deg
i 6.736084415587576 4.3677e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1694  
   data-arc span      14422 days (39.49 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47972  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:05:40  

Additional Information
 Jupiter MOID = 1.72158 au 
 T_jup = 3.189 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.433949468147322E-15 -4.378332305468711E-15 -7.903293069802436E-13 -2.190001560821402E-15 -2.234872942473028E-13 -4.850796968031318E-16
q -4.378332305468711E-15 1.352557075300999E-14 2.222667025717185E-12 7.08897396762211E-15 6.522120052066977E-13 1.878108718065056E-15
tp -7.903293069802436E-13 2.222667025717185E-12 7.324249468758168E-9 6.143647105918089E-12 1.456936059514923E-9 -1.727794561737004E-12
node -2.190001560821402E-15 7.08897396762211E-15 6.143647105918089E-12 1.484360060121492E-9 -1.47239410220962E-9 5.52083336643607E-11
peri -2.234872942473028E-13 6.522120052066977E-13 1.456936059514923E-9 -1.47239410220962E-9 1.765862428458798E-9 -5.507360201831786E-11
i -4.850796968031318E-16 1.878108718065056E-15 -1.727794561737004E-12 5.52083336643607E-11 -5.507360201831786E-11 1.907679079613665E-11

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 13.3   n/a MPO502250  
diameter diameter 11.112 km 0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.65653 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.082   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

10540 Hachigoroh           Discovered 1991 Nov. 13 by S. Otomo at Kiyosato.
Hachigoroh Kikuchi (1926-1999) was the executive committee chief of the Haramura star party and was instrumental in getting it started. The name was suggested by S. Horiuchi.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14

[ show close-approach data ]
Alternate Designations
 1991 VP4 = 1980 WZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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