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173273 (1999 SZ4)
Classification: Main-belt Asteroid          SPK-ID: 2173273
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2753723273912418 4.8482e-08  
a 2.352895454990091 9.8482e-09 au
q 1.704973157441195 1.172e-07 au
i 12.33285382072477 4.7954e-06 deg
node 354.6612668171642 1.9021e-05 deg
peri 342.6816673866835 1.9916e-05 deg
M 267.6847181793994 7.4848e-06 deg
tp 2459338.544186966258
(2021-May-04.04418697)
2.8579e-05 TDB
period 1318.263941872036
3.61
8.2765e-06
2.266e-08
d
yr
n .2730864347914821 1.7145e-09 deg/d
Q 3.000817752538988 1.256e-08 au
  Orbit Determination Parameters
   # obs. used (total)      630  
   data-arc span      7563 days (20.71 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50542  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:23:14  

Additional Information
 Earth MOID = .700705 au 
 Jupiter MOID = 2.41297 au 
 T_jup = 3.475 
[ 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 15.8   n/a MPO264384  
diameter diameter 3.460 km 0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.523 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.080   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173273 (1999 SZ4)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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