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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1135479601595982 3.8261e-08  
a 2.3878908937765 7.9128e-09 au
q 2.116750753704498 9.0485e-08 au
i 12.06578664638523 4.173e-06 deg
node 183.1490749608786 1.6332e-05 deg
peri 66.75609366257156 2.318e-05 deg
M 192.318211928537 1.6133e-05 deg
tp 2459628.274313160889
(2022-Feb-17.77431316)
6.0766e-05 TDB
period 1347.783532947558
3.69
6.6992e-06
1.834e-08
d
yr
n .2671052073270935 1.3277e-09 deg/d
Q 2.659031033848501 8.8113e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2321  
   data-arc span      23935 days (65.53 yr)  
   first obs. used      1955-04-21  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46451  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:02:00  

Additional Information
 Earth MOID = 1.13714 au 
 Jupiter MOID = 2.39285 au 
 T_jup = 3.495 
[ show covariance matrix ]

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. 2019-August); 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

[ show close-approach data ]
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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