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2740 Tsoj (1974 SY4)
Classification: Main-belt Asteroid          SPK-ID: 2002740
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07166685263617077 3.031e-08  
a 3.002918359180457 1.4369e-08 au
q 2.787708651654619 9.3305e-08 au
i 9.365949055582028 3.5869e-06 deg
node 197.7674684982489 2.047e-05 deg
peri 94.88816501722822 3.3215e-05 deg
M 8.974690591693134 2.5306e-05 deg
tp 2458953.116111387805
(2020-Apr-13.61611139)
0.00013363 TDB
period 1900.700612027679
5.20
1.3642e-05
3.735e-08
d
yr
n .1894038428366421 1.3595e-09 deg/d
Q 3.218128066706294 1.5399e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2764  
   data-arc span      24404 days (66.81 yr)  
   first obs. used      1953-10-08  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:55:56  

Additional Information
 Earth MOID = 1.79259 au 
 Jupiter MOID = 1.9295 au 
 T_jup = 3.228 
[ 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 11.4   n/a MPO302078  
diameter diameter 17.701 km 0.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 22.042 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.122   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2740 Tsoj (1974 SY4)          Discovered 1974-Sep-26 by Zhuravleva, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 SY4 = 1951 GW = 1953 TY = 1958 TB1 = 1972 GD = 1974 TD1 = 1977 EB1 = 1979 SC9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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