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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3169178564723226 9.6234e-09  
a 2.360249875237184 9.659e-09 au
q 1.612244544037949 2.1681e-08 au
i 22.85996373799731 1.0276e-06 deg
node 23.52074196508315 2.085e-06 deg
peri 293.5267492757006 6.2203e-06 deg
M 214.5336166659509 7.4935e-06 deg
tp 2459735.674660737900
(2022-Jun-05.17466074)
3.001e-05 TDB
period 1324.449494445825
3.63
8.1302e-06
2.226e-08
d
yr
n .271811044143009 1.6685e-09 deg/d
Q 3.108255206436418 1.272e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1808  
   data-arc span      14080 days (38.55 yr)  
   first obs. used      1982-08-22  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:09:01  

Additional Information
 Earth MOID = .722591 au 
 Jupiter MOID = 2.6206 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 13.57   n/a E2021B10  
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. 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:
[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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