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15790 Keizan (1993 TC)
Classification: Mars-crossing Asteroid          SPK-ID: 2015790
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3168381897243822 3.9978e-08  
a 2.360407269710451 1.1145e-08 au
q 1.61254010336312 9.3257e-08 au
i 22.85798457205081 3.9977e-06 deg
node 23.53117630535706 1.1653e-05 deg
peri 293.4994079407606 1.3664e-05 deg
M 160.2057246982322 1.2641e-05 deg
tp 2458411.039955902420
(2018-Oct-19.53995590)
4.3547e-05 TDB
period 1324.581979045037
3.63
9.3812e-06
2.568e-08
d
yr
n .2717838576209104 1.9249e-09 deg/d
Q 3.108274436057782 1.4676e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1636  
   data-arc span      13764 days (37.68 yr)  
   first obs. used      1982-08-22  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46115  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:15:40  

Additional Information
 Earth MOID = .724406 au 
 Jupiter MOID = 2.62014 au 
 T_jup = 3.382 
[ 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 13.5   n/a MPO358784  
diameter diameter 5.606 km 1.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 19.68 h n/a LCDB (Rev. 2019-August); 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:
[Hoot, J.E. (2015) http://www.planetarysciences.org/]
geometric albedo albedo 0.243   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

15790 Keizan           Discovered 1993 Oct. 8 by M. Mukai and M. Takeishi at the JCPM Kagoshima Station.
The Japanese priest Keizan Zenji (1268-1325) practised asceticism at the Eiheiji Temple in Fukui prefecture and built Sojiji Temple in 1321. Afterwards he built temples in various parts of Japan to spread Zen Buddhism.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1993 TC = 1999 AP22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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