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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1846655965741821 3.445e-08  
a 2.176048241251539 6.597e-09 au
q 1.774206994606624 7.5682e-08 au
i 1.149369561061452 3.0079e-06 deg
node 39.23580448051153 0.0001931 deg
peri 293.6479720152779 0.00019326 deg
M 166.191126181685 8.3574e-06 deg
tp 2458459.239249303096
(2018-Dec-06.73924930)
2.6333e-05 TDB
period 1172.468559108659
3.21
5.3318e-06
1.46e-08
d
yr
n .3070444808120751 1.3963e-09 deg/d
Q 2.577889487896454 7.8153e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1059  
   data-arc span      10215 days (27.97 yr)  
   first obs. used      1992-05-01  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55018  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:21:06  

Additional Information
 Earth MOID = .764259 au 
 Jupiter MOID = 2.77609 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-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:
[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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