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21302 Shirakamisanchi (1996 XU)
Classification: Main-belt Asteroid          SPK-ID: 2021302
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074216371950085 3.5574e-08  
a 2.323869963515255 7.6086e-09 au
q 2.074236047406142 8.3766e-08 au
i 4.225149681442553 3.9225e-06 deg
node 250.1167576671561 5.8414e-05 deg
peri 61.90807435600293 6.1718e-05 deg
M 26.47768481388654 2.0381e-05 deg
tp 2459105.331402720874
(2020-Sep-12.83140272)
7.3166e-05 TDB
period 1293.94602516444
3.54
6.3548e-06
1.74e-08
d
yr
n .2782187146903981 1.3664e-09 deg/d
Q 2.573503879624368 8.4259e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1406  
   data-arc span      10294 days (28.18 yr)  
   first obs. used      1992-10-18  
   last obs. used      2020-12-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52287  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:43:04  

Additional Information
 Earth MOID = 1.06193 au 
 Jupiter MOID = 2.63427 au 
 T_jup = 3.564 
[ 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 15.26   n/a E2021B10  
diameter diameter 2.260 km 0.324 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.884 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.315   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21302 Shirakamisanchi           Discovered 1996 Dec. 1 by N. Sato at Chichibu.
Shirakamisanchi is a mountain district spreading over Aomori Prefecture and Akita Prefecture, Japan. It is famous for a primeval forest of beech trees and was registered as a World Nature Heritage site in 1993.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110715/MPCPages.arcLast Updated: 2011-07-20

[ show close-approach data ]
Alternate Designations
 1996 XU = 1998 FY97 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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