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23478 Chikumagawa (1991 BZ)
Classification: Main-belt Asteroid          SPK-ID: 2023478
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2447993609174072 4.8157e-08  
a 2.805948145460907 1.1071e-08 au
q 2.119053832684693 1.3408e-07 au
i 6.023839160358811 4.0165e-06 deg
node 288.4017422986786 5.0806e-05 deg
peri 128.3936709202149 5.1591e-05 deg
M 166.7311197557373 9.7806e-06 deg
tp 2458405.381141068422
(2018-Oct-13.88114107)
4.4832e-05 TDB
period 1716.792819689069
4.70
1.0161e-05
2.782e-08
d
yr
n .2096933280890586 1.2411e-09 deg/d
Q 3.49284245823712 1.3782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1541  
   data-arc span      14491 days (39.67 yr)  
   first obs. used      1980-10-07  
   last obs. used      2020-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48727  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:24:44  

Additional Information
 Earth MOID = 1.13682 au 
 Jupiter MOID = 1.89895 au 
 T_jup = 3.271 
[ 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 13.72   n/a MPCxxxxx  
diameter diameter 7.869 km 0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 133.406 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.114   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

23478 Chikumagawa           Discovered 1991 Jan. 21 by T. Seki at Geisei.
The Chikumagawa River originates in Nagano prefecture and flows through Niigata prefecture with many historic sites lying along it. "Chikumagawa Ryojo no Uta" (A poem of a journey along the River Chikuma) is a widely-known poem written by the prominent Japanese novelist and poet Shimazaki Toson.
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 2020-08-07Last Updated: 2020-08-24

[ show close-approach data ]
Alternate Designations
 1991 BZ = 1980 TL5 
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