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29162 (1989 SD4)
Classification: Main-belt Asteroid          SPK-ID: 2029162
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04467774549777225 5.4566e-08  
a 2.578835510460844 1.4848e-08 au
q 2.463618953843856 1.4918e-07 au
i 15.16159571779394 5.4097e-06 deg
node 34.26198969496801 1.4254e-05 deg
peri 95.9183191192575 9.7323e-05 deg
M 36.39775924474902 9.0356e-05 deg
tp 2458847.565299542974
(2019-Dec-30.06529954)
0.00038028 TDB
period 1512.634110092151
4.14
1.3064e-05
3.577e-08
d
yr
n .2379954263877261 2.0554e-09 deg/d
Q 2.694052067077831 1.5511e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1585  
   data-arc span      11087 days (30.35 yr)  
   first obs. used      1989-09-26  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4745  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:35:26  

Additional Information
 Earth MOID = 1.522 au 
 Jupiter MOID = 2.34189 au 
 T_jup = 3.375 
[ 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 13.9   n/a MPO502376  
diameter diameter 5.116 km 0.574 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.505 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 0.223   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

29162 (1989 SD4)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 SD4 = 1989 TB4 = 2000 JZ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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