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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04456407479952426 5.4026e-08  
a 2.578406425232846 1.4156e-08 au
q 2.463502128435195 1.473e-07 au
i 15.16272215895073 4.8978e-06 deg
node 34.25990997986074 1.4211e-05 deg
peri 95.75873722921469 9.6709e-05 deg
M 84.16904815685949 8.9268e-05 deg
tp 2458846.930003596602
(2019-Dec-29.43000360)
0.00037657 TDB
period 1512.256601357918
4.14
1.2454e-05
3.41e-08
d
yr
n .238054837834228 1.9604e-09 deg/d
Q 2.693310722030496 1.4787e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      11222 days (30.72 yr)  
   first obs. used      1989-09-26  
   last obs. used      2020-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45902  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:07:22  

Additional Information
 Earth MOID = 1.52167 au 
 Jupiter MOID = 2.34165 au 
 T_jup = 3.376 
[ 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 13.97   n/a E2021B10  
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. 2020-October); 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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