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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04467775228369746 5.4182e-08  
a 2.57883550638246 1.4216e-08 au
q 2.463618932447901 1.478e-07 au
i 15.16159634530853 4.8974e-06 deg
node 34.26199047971642 1.4212e-05 deg
peri 95.91831283074863 9.6278e-05 deg
M 36.39776664342754 8.905e-05 deg
tp 2458847.565268818288
(2019-Dec-30.06526882)
0.00037485 TDB
period 1512.634106503843
4.14
1.2508e-05
3.425e-08
d
yr
n .2379954269523046 1.968e-09 deg/d
Q 2.694052080317018 1.4851e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:13:28  

Additional Information
 Earth MOID = 1.522 au 
 Jupiter MOID = 2.34189 au 
 T_jup = 3.375 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457265.5 (2015-Aug-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04463198436880144 5.6188e-08  
q 2.463861747422612 1.5333e-07 au
tp 2457341.601784508547
(2015-Nov-15.10178451)
0.00037391 TDB
node 34.30246182619979 1.4223e-05 deg
peri 97.5947969168699 9.4363e-05 deg
i 15.15580226606451 4.8955e-06 deg
  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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:13:28  

Additional Information
 Jupiter MOID = 2.34189 au 
 T_jup = 3.375 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.157139819956271E-15 -8.592392916086502E-15 1.661273941853129E-11 -1.540871272414091E-14 4.177243471261428E-12 -1.728362790031499E-14
q -8.592392916086502E-15 2.351019601750343E-14 -4.585661278379931E-11 4.309686697180521E-14 -1.153118171782045E-11 4.731866353493349E-14
tp 1.661273941853129E-11 -4.585661278379931E-11 1.398107832517739E-7 -1.09161034948861E-10 3.48922300313825E-8 -1.028813617832256E-10
node -1.540871272414091E-14 4.309686697180521E-14 -1.09161034948861E-10 2.023063733296899E-10 -2.220952650850865E-10 -2.571113024315299E-11
peri 4.177243471261428E-12 -1.153118171782045E-11 3.48922300313825E-8 -2.220952650850865E-10 8.904417152106645E-9 -9.222421135309446E-13
i -1.728362790031499E-14 4.731866353493349E-14 -1.028813617832256E-10 -2.571113024315299E-11 -9.222421135309446E-13 2.396563858445286E-11

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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