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24940 Sankichiyama (1997 JY4)
Classification: Main-belt Asteroid          SPK-ID: 2024940
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1440149218912664 2.6883e-08  
a 2.52662522793717 9.1101e-09 au
q 2.162753493087295 6.7551e-08 au
i 11.95452301217022 3.797e-06 deg
node 51.45637218324981 1.4565e-05 deg
peri 264.8772698539524 2.098e-05 deg
M 245.4911224037556 1.6621e-05 deg
tp 2459667.101710107149
(2022-Mar-28.60171011)
6.8701e-05 TDB
period 1466.930941641531
4.02
7.9339e-06
2.172e-08
d
yr
n .2454103255857098 1.3273e-09 deg/d
Q 2.890496962787045 1.0422e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2127  
   data-arc span      8719 days (23.87 yr)  
   first obs. used      1997-05-01  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48504  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:51:37  

Additional Information
 Earth MOID = 1.18714 au 
 Jupiter MOID = 2.43602 au 
 T_jup = 3.409 
[ 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 14.07   n/a E2021B10  
rotation period rot_per 2.76397 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

24940 Sankichiyama           Discovered 1997 May 1 by T. Okuni at Nanyo.
Sankichiyama mountain is located to the east of Kaminoyama, a hot-spring town in Yamagata prefecture. The mountain is loved by citizens as a hiking course.
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

Alternate Designations
 1997 JY4 = 1998 VO10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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