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21117 Tashimaseizo (1992 SB13)
Classification: Main-belt Asteroid          SPK-ID: 2021117
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09517787084033605 1.301e-08  
a 2.284539579049402 5.6665e-09 au
q 2.067101966065003 2.9882e-08 au
i 3.571273524054102 1.0973e-06 deg
node 46.89436105013402 3.6959e-06 deg
peri 85.79694561829838 1.1307e-05 deg
M 315.6216619524091 1.1392e-05 deg
tp 2459355.976583915594
(2021-May-21.47658392)
4.0117e-05 TDB
period 1261.236284909778
3.45
4.6925e-06
1.285e-08
d
yr
n .2854342237907884 1.062e-09 deg/d
Q 2.501977192033802 6.2059e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2430  
   data-arc span      23739 days (64.99 yr)  
   first obs. used      1956-03-16  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:39:42  

Additional Information
 Earth MOID = 1.08497 au 
 Jupiter MOID = 2.51958 au 
 T_jup = 3.594 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.01   n/a E2021B10  
diameter diameter 3.869 km 0.211 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.803 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.356   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21117 Tashimaseizo           Discovered 1992 Sept. 30 by K. Endate and K. Watanabe at Kitami.
Seizo Tashima (b. 1940) is well-known as an author of illustrated books. He has won many national and international prizes for his books and pictures.
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 2017-03-12Last Updated: 2017-03-14

Alternate Designations
 1992 SB13 = 1987 FS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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