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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1135479599343566 3.8721e-08  
a 2.387890893518672 7.9576e-09 au
q 2.116750754013799 9.1487e-08 au
i 12.06578684333502 4.2192e-06 deg
node 183.1490753859006 1.6372e-05 deg
peri 66.75609425292514 2.336e-05 deg
M 192.3182111304847 1.6256e-05 deg
tp 2459628.274316046998
(2022-Feb-17.77431605)
6.1185e-05 TDB
period 1347.783532729271
3.69
6.7372e-06
1.845e-08
d
yr
n .2671052073703538 1.3352e-09 deg/d
Q 2.659031033023544 8.8612e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2224  
   data-arc span      23658 days (64.77 yr)  
   first obs. used      1955-04-21  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:55:47  

Additional Information
 Earth MOID = 1.13714 au 
 Jupiter MOID = 2.39285 au 
 T_jup = 3.495 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457068.5 (2015-Feb-15.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1135986180376957 3.8575e-08  
q 2.116500225756527 9.1107e-08 au
tp 2456934.055259607417
(2014-Oct-03.55525961)
6.126e-05 TDB
node 183.1749137400878 1.6362e-05 deg
peri 67.00609964316087 2.3415e-05 deg
i 12.0694413547579 4.2206e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2224  
   data-arc span      23658 days (64.77 yr)  
   first obs. used      1955-04-21  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:55:47  

Additional Information
 Jupiter MOID = 2.39285 au 
 T_jup = 3.495 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.488050598499911E-15 -3.50422314270888E-15 -9.600525674269204E-13 -4.484540563628466E-15 -2.909883738824445E-13 -3.956231951933626E-15
q -3.50422314270888E-15 8.300558329184967E-15 2.247719389098704E-12 1.142344719458023E-14 6.820261880362243E-13 9.888158839911251E-15
tp -9.600525674269204E-13 2.247719389098704E-12 3.752777995379463E-9 6.359074340526059E-12 1.035771984662763E-9 2.267253582572585E-12
node -4.484540563628466E-15 1.142344719458023E-14 6.359074340526059E-12 2.677166838614273E-10 -2.595094603938187E-10 2.201006954849509E-11
peri -2.909883738824445E-13 6.820261880362243E-13 1.035771984662763E-9 -2.595094603938187E-10 5.482618288721589E-10 -2.083923830452801E-11
i -3.956231951933626E-15 9.888158839911251E-15 2.267253582572585E-12 2.201006954849509E-11 -2.083923830452801E-11 1.781310831047412E-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. 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

[ hide close-approach data ]
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 36 CATAB v2.0f-lin.ifort 2020-Feb-22 19:56:05 2020-Feb-22 19:56
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 36 CATAB v2.0f-lin.ifort 2020-Feb-22 19:56:05 2020-Feb-22 19:56
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 36 CATAB v2.0f-lin.ifort 2020-Feb-22 19:56:05 2020-Feb-22 19:56

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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