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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 ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1134103768363418 1.5352e-08  
a 2.388093175630894 7.1935e-09 au
q 2.117258628662298 3.7801e-08 au
i 12.06596254246942 9.414e-07 deg
node 183.1408583459983 1.4365e-06 deg
peri 66.78137446650381 1.0586e-05 deg
M 245.7055608149126 1.1163e-05 deg
tp 2459628.454826186734
(2022-Feb-17.95482619)
4.2504e-05 TDB
period 1347.954795751126
3.69
6.0905e-06
1.667e-08
d
yr
n .26707127059064 1.2067e-09 deg/d
Q 2.658927722599489 8.0093e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2654  
   data-arc span      24075 days (65.91 yr)  
   first obs. used      1955-04-21  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44714  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:51:12  

Additional Information
 Earth MOID = 1.13631 au 
 Jupiter MOID = 2.3918 au 
 T_jup = 3.495 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457459.5 (2016-Mar-12.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1138041348342986 1.5289e-08  
q 2.115876568703063 3.7633e-08 au
tp 2456934.041095178592
(2014-Oct-03.54109518)
3.9448e-05 TDB
node 183.172785855993 1.4355e-06 deg
peri 66.97282804153042 1.0593e-05 deg
i 12.07070881761119 9.4171e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2654  
   data-arc span      24075 days (65.91 yr)  
   first obs. used      1955-04-21  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44714  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:51:12  

Additional Information
 Jupiter MOID = 2.3918 au 
 T_jup = 3.495 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.337531476269766E-16 -5.671551336879528E-16 -1.786214754567794E-13 3.440584206628499E-15 -7.163235456378266E-14 4.308096137605818E-15
q -5.671551336879528E-16 1.41622223557854E-15 4.520115832913813E-13 -8.346067189394901E-15 1.81202162923528E-13 -1.032929197214059E-14
tp -1.786214754567794E-13 4.520115832913813E-13 1.55613415837797E-9 6.750948484014176E-12 4.101529851085819E-10 -2.538003961672072E-11
node 3.440584206628499E-15 -8.346067189394901E-15 6.750948484014176E-12 2.060579594574273E-12 2.047145910053225E-14 -5.317690903182738E-13
peri -7.163235456378266E-14 1.81202162923528E-13 4.101529851085819E-10 2.047145910053225E-14 1.122073798854137E-10 -6.33975360571645E-12
i 4.308096137605818E-15 -1.032929197214059E-14 -2.538003961672072E-11 -5.317690903182738E-13 -6.33975360571645E-12 8.868163847721909E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.47   n/a MPCxxxxx  
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

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