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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1698685830144263 3.781e-08  
a 3.100889266968175 1.4312e-08 au
q 2.574145601103648 1.1659e-07 au
i 6.735481965869869 3.4454e-06 deg
node 110.6411559562648 3.7333e-05 deg
peri 309.4174022076822 3.9456e-05 deg
M 147.1335869396144 1.2955e-05 deg
tp 2458581.350745855765
(2019-Apr-07.85074586)
7.0177e-05 TDB
period 1994.471402456614
5.46
1.3808e-05
3.78e-08
d
yr
n .1804989530341642 1.2496e-09 deg/d
Q 3.627632932832702 1.6743e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1990  
   data-arc span      14828 days (40.60 yr)  
   first obs. used      1980-11-29  
   last obs. used      2021-07-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47141  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 13:00:18  

Additional Information
 Earth MOID = 1.59321 au 
 Jupiter MOID = 1.72447 au 
 T_jup = 3.189 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457517.5 (2016-May-09.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1692066228411694 3.763e-08  
q 2.576396921831138 1.1586e-07 au
tp 2456588.599082280240
(2013-Oct-23.09908228)
6.8731e-05 TDB
node 110.6565749348665 3.7328e-05 deg
peri 309.8862945427554 3.9485e-05 deg
i 6.735442301347559 3.4453e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1990  
   data-arc span      14828 days (40.60 yr)  
   first obs. used      1980-11-29  
   last obs. used      2021-07-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47141  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 13:00:18  

Additional Information
 Jupiter MOID = 1.72447 au 
 T_jup = 3.189 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.416026064905009E-15 -4.337620111013149E-15 -5.697960839000138E-13 2.541464892133518E-15 -1.804640152841981E-13 5.849638594805343E-16
q -4.337620111013149E-15 1.342462910904772E-14 1.792293389013634E-12 -8.186823199434466E-15 5.745517679203493E-13 -1.463870719433912E-15
tp -5.697960839000138E-13 1.792293389013634E-12 4.723902957554544E-9 -1.545584899510679E-12 9.041253262875569E-10 -1.901126632521148E-12
node 2.541464892133518E-15 -8.186823199434466E-15 -1.545584899510679E-12 1.393393746169855E-9 -1.383933717331314E-9 2.991812737313738E-11
peri -1.804640152841981E-13 5.745517679203493E-13 9.041253262875569E-10 -1.383933717331314E-9 1.559055436774631E-9 -3.003654366982808E-11
i 5.849638594805343E-16 -1.463870719433912E-15 -1.901126632521148E-12 2.991812737313738E-11 -3.003654366982808E-11 1.186985557707353E-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 13.31   n/a MPO636225  
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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