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15805 Murakamitakehiko (1994 GB1)
Classification: Main-belt Asteroid          SPK-ID: 2015805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1967725133076921 2.9269e-08  
a 2.271483931276054 6.5131e-09 au
q 1.824518329180828 6.6229e-08 au
i 5.509129444097913 4.0753e-06 deg
node 40.1472325770379 3.2829e-05 deg
peri 238.8004723706425 3.4353e-05 deg
M 174.7522533269694 1.0927e-05 deg
tp 2458393.507655230957
(2018-Oct-02.00765523)
3.7288e-05 TDB
period 1250.44020867645
3.42
5.3782e-06
1.472e-08
d
yr
n .2878986116265793 1.2383e-09 deg/d
Q 2.71844953337128 7.7947e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2368  
   data-arc span      10671 days (29.22 yr)  
   first obs. used      1991-08-06  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:31:15  

Additional Information
 Earth MOID = .815668 au 
 Jupiter MOID = 2.42549 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456738.5 (2014-Mar-22.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1965938791349369 2.9198e-08  
q 1.824926535677713 6.5975e-08 au
tp 2457143.816348542366
(2015-May-01.31634854)
3.6588e-05 TDB
node 40.1682452054898 3.2821e-05 deg
peri 238.8295087395326 3.4356e-05 deg
i 5.510132462265516 4.0754e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2368  
   data-arc span      10671 days (29.22 yr)  
   first obs. used      1991-08-06  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:31:15  

Additional Information
 Jupiter MOID = 2.42549 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.524975453995137E-16 -1.920241330918076E-15 -1.171877216909396E-13 -3.326689050827806E-15 -4.773871954309107E-14 -3.203533514276524E-16
q -1.920241330918076E-15 4.352642714782693E-15 2.792424476010922E-13 7.141072316207323E-15 1.081572505280777E-13 7.661611161817067E-16
tp -1.171877216909396E-13 2.792424476010922E-13 1.338702992226771E-9 7.90292741674905E-13 3.775472208310391E-10 -1.388224944927167E-12
node -3.326689050827806E-15 7.141072316207323E-15 7.90292741674905E-13 1.077202684867192E-9 -1.07149357469762E-9 -4.618494374040206E-12
peri -4.773871954309107E-14 1.081572505280777E-13 3.775472208310391E-10 -1.07149357469762E-9 1.180304093117084E-9 4.239169638032479E-12
i -3.203533514276524E-16 7.661611161817067E-16 -1.388224944927167E-12 -4.618494374040206E-12 4.239169638032479E-12 1.660912343263708E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO302163  
diameter diameter 4.951 km 0.274 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.315   0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15805 Murakamitakehiko           Discovered 1994 Apr. 8 by K. Endate and K. Watanabe at Kitami.
Takehiko Murakami (b. 1956) is a well-known amateur astronomer in Kanagawa Prefecture. He supports the organization of star parties for local children and citizens. He enjoys observing and photographing nebulae and star clusters.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-09-28Last Updated: 2015-10-05

Alternate Designations
 1994 GB1 = 1998 MH48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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