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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1134103715989518 3.2093e-08  
a 2.388093175373482 7.4857e-09 au
q 2.117258640941455 7.7058e-08 au
i 12.06595595917668 3.7309e-06 deg
node 183.140851350001 1.539e-05 deg
peri 66.78136778142301 2.1559e-05 deg
M 245.7055731379657 1.5569e-05 deg
tp 2459628.454779976099
(2022-Feb-17.95477998)
5.8761e-05 TDB
period 1347.954795533183
3.69
6.3379e-06
1.735e-08
d
yr
n .2670712706338213 1.2557e-09 deg/d
Q 2.65892770980551 8.3347e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2479  
   data-arc span      24014 days (65.75 yr)  
   first obs. used      1955-04-21  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45513  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:58:28  

Additional Information
 Earth MOID = 1.13631 au 
 Jupiter MOID = 2.3918 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 13.46   n/a E2021B10  
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

[ 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 41 CATAB v2.0f-lin.ifort 2021-Feb-24 01:58:34 2021-Feb-24 01:58
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 41 CATAB v2.0f-lin.ifort 2021-Feb-24 01:58:34 2021-Feb-24 01:58
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 41 CATAB v2.0f-lin.ifort 2021-Feb-24 01:58:34 2021-Feb-24 01:58

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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