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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

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Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1968-Aug-14 14:25 < 00:01 David 0.0257405643973298 0.0257375152977035 0.0257436137835422 6.02304753290999 6.02304743546743 2440083.100991050 0.597911478825181 204.453094884015 21.3644689104159 -42.2607607218317 121957.168313618 T 37 CATAB v2.0f-lin.ifort 2020-Nov-13 03:02:05 2020-Nov-13 03:02
1989-Aug-15 01:43 < 00:01 Eunom 0.0331501020059724 0.0331494585323265 0.0331507454957036 8.55506361895404 8.55506356945626 2447753.571755059 0.233035191839093 120.615582677638 30.4674671281315 -85.0630325573538 162163.933637621 T 37 CATAB v2.0f-lin.ifort 2020-Nov-13 03:02:05 2020-Nov-13 03:02
2056-May-01 13:04 < 00:01 Amphi 0.0208232646266164 0.0208179138227139 0.020828615528584 6.79049811892913 6.79049807827332 2472120.044455529 0.289911934112094 276.238225525373 29.2962556068364 15.1258931984353 29796.8180693167 T 37 CATAB v2.0f-lin.ifort 2020-Nov-13 03:02:05 2020-Nov-13 03:02

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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