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11072 Hiraoka (1992 GP)
Classification: Main-belt Asteroid          SPK-ID: 2011072
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1135479562860511 3.796e-08  
a 2.387890893284377 7.8903e-09 au
q 2.116750762517863 8.9825e-08 au
i 12.06578629008421 4.1514e-06 deg
node 183.1490741444228 1.6302e-05 deg
peri 66.75609584059895 2.3101e-05 deg
M 192.3182109403914 1.609e-05 deg
tp 2459628.274316666283
(2022-Feb-17.77431667)
6.0623e-05 TDB
period 1347.783532530909
3.69
6.6802e-06
1.829e-08
d
yr
n .2671052074096655 1.3239e-09 deg/d
Q 2.659031024050891 8.7863e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2341  
   data-arc span      23951 days (65.57 yr)  
   first obs. used      1955-04-21  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:44:35  

Additional Information
 Earth MOID = 1.13714 au 
 Jupiter MOID = 2.39285 au 
 T_jup = 3.495 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457130.5 (2015-Apr-18.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136319830371851 3.7819e-08  
q 2.116466974253529 8.9464e-08 au
tp 2456934.051938332414
(2014-Oct-03.55193833)
6.0404e-05 TDB
node 183.1734105993724 1.6291e-05 deg
peri 67.00496717061151 2.3149e-05 deg
i 12.06963162066167 4.1527e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2341  
   data-arc span      23951 days (65.57 yr)  
   first obs. used      1955-04-21  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:44:35  

Additional Information
 Jupiter MOID = 2.39285 au 
 T_jup = 3.495 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.430291291560084E-15 -3.373313397887433E-15 -8.89032956900914E-13 -4.194080137236768E-15 -2.688795685571423E-13 -3.759556232540986E-15
q -3.373313397887433E-15 8.003825932953064E-15 2.087842484326511E-12 1.069934684958214E-14 6.322882222392615E-13 9.41286567960458E-15
tp -8.89032956900914E-13 2.087842484326511E-12 3.648701950571317E-9 6.254340132320452E-12 1.003241940310438E-9 2.196359864144569E-12
node -4.194080137236768E-15 1.069934684958214E-14 6.254340132320452E-12 2.653972196537172E-10 -2.572802261007971E-10 2.113851903696911E-11
peri -2.688795685571423E-13 6.322882222392615E-13 1.003241940310438E-9 -2.572802261007971E-10 5.358843925408247E-10 -2.001035928038598E-11
i -3.759556232540986E-15 9.41286567960458E-15 2.196359864144569E-12 2.113851903696911E-11 -2.001035928038598E-11 1.724515335755859E-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 13.4   n/a MPO449021  
diameter diameter 8.747 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.7512 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2007) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.093   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

11072 Hiraoka           Discovered 1992 Apr. 3 by K. Endate and K. Watanabe at Kitami.
Hiroyuki Hiraoka (b. 1957) is an elementary-school teacher and amateur astronomer, active in the Hiroshima Astronomical Society.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1992 GP = 1955 HC1 = 1999 CJ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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