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8877 Rentaro (1993 BK2)
Classification: Main-belt Asteroid          SPK-ID: 2008877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09202685144375833 2.8397e-08  
a 2.766642757368714 9.8558e-09 au
q 2.512037335338393 7.9211e-08 au
i 2.577660380270399 3.5491e-06 deg
node 330.8217851104951 7.0491e-05 deg
peri 142.2113161672379 7.3523e-05 deg
M 77.89409345194545 1.9981e-05 deg
tp 2459032.811071699671
(2020-Jul-02.31107170)
9.3168e-05 TDB
period 1680.846497929792
4.60
8.9817e-06
2.459e-08
d
yr
n .2141777969870494 1.1445e-09 deg/d
Q 3.021248179399035 1.0763e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1992  
   data-arc span      15978 days (43.75 yr)  
   first obs. used      1977-09-09  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:53:23  

Additional Information
 Earth MOID = 1.52953 au 
 Jupiter MOID = 2.05349 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457113.5 (2015-Apr-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09050683688688743 2.8673e-08  
q 2.516173598908627 7.9857e-08 au
tp 2457356.394967682423
(2015-Nov-29.89496768)
9.4381e-05 TDB
node 330.9305471803333 7.0332e-05 deg
peri 143.2131753592674 7.3434e-05 deg
i 2.581367707398091 3.5515e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1992  
   data-arc span      15978 days (43.75 yr)  
   first obs. used      1977-09-09  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:53:23  

Additional Information
 Jupiter MOID = 2.05349 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.221160400533853E-16 -2.275351287475595E-15 4.792507777473321E-13 1.312161902664127E-15 1.087803863353067E-13 -2.022978158217572E-16
q -2.275351287475595E-15 6.377154143890094E-15 -1.378389667218361E-12 -4.869402364007115E-15 -3.147458189465645E-13 5.977517183985562E-16
tp 4.792507777473321E-13 -1.378389667218361E-12 8.907818203886673E-9 6.584090180000879E-12 2.003640717448547E-9 5.677934182058216E-13
node 1.312161902664127E-15 -4.869402364007115E-15 6.584090180000879E-12 4.946551598223051E-9 -4.93982645803063E-9 2.295910734494863E-11
peri 1.087803863353067E-13 -3.147458189465645E-13 2.003640717448547E-9 -4.93982645803063E-9 5.392610469083929E-9 -2.281026495461645E-11
i -2.022978158217572E-16 5.977517183985562E-16 5.677934182058216E-13 2.295910734494863E-11 -2.281026495461645E-11 1.261299524405041E-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 14.26   n/a MPCxxxxx  

8877 Rentaro           Discovered 1993 Jan. 19 by T. Seki at Geisei.
Named in memory of Rentaro Taki (1879-1903), gifted Japanese composer. After he finished his schooling in Japan he went to Germany and trained at the Music Academy in Leipzig. Not long afterward, however, he developed tuberculosis and returned to Japan to die. His songs, which include "The Moon over the Ruins of a Castle", are among the best loved in Japan. < 1 observations>
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1993 BK2 = 1977 RF19 = 1998 FX42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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