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21275 Tosiyasu (1996 SJ7)
Classification: Main-belt Asteroid          SPK-ID: 2021275
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1844671461701625 3.6872e-08  
a 2.175971394642763 7.1781e-09 au
q 1.774576161325104 8.1757e-08 au
i 1.149495369838344 3.286e-06 deg
node 39.24665616521987 0.00019838 deg
peri 293.6079064090526 0.00019858 deg
M 43.42608758582884 8.3089e-06 deg
tp 2458459.074929863983
(2018-Dec-06.57492986)
2.6907e-05 TDB
period 1172.40645149853
3.21
5.8013e-06
1.588e-08
d
yr
n .3070607463306435 1.5194e-09 deg/d
Q 2.577366627960421 8.5022e-09 au
  Orbit Determination Parameters
   # obs. used (total)      961  
   data-arc span      10080 days (27.60 yr)  
   first obs. used      1992-05-01  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56288  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:50:08  

Additional Information
 Earth MOID = .763715 au 
 Jupiter MOID = 2.77353 au 
 T_jup = 3.662 
[ 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 15.9   n/a MPO296306  
diameter diameter 1.792 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.971 h n/a LCDB (Rev. 2019-January); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.200   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21275 Tosiyasu           Discovered 1996 Sept. 23 by T. Okuni at Nanyo.
Tosiyasu Funakosi (b. 1953), a farmer, is a Japanese amateur astronomer who has been observing occultations since 1981.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1996 SJ7 = 1999 RP54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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