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1029 La Plata (A924 HB)
Classification: Main-belt Asteroid          SPK-ID: 2001029
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02783563940807329 4.0706e-08  
a 2.890528158847997 9.481e-09 au
q 2.810068459319422 1.1941e-07 au
i 2.424526634201545 4.172e-06 deg
node 29.88689259897459 8.0444e-05 deg
peri 140.7486143925319 9.9761e-05 deg
M 290.2448674249939 5.9321e-05 deg
tp 2459548.306665998514
(2021-Nov-29.80666600)
0.00029607 TDB
period 1794.999093791833
4.91
8.8314e-06
2.418e-08
d
yr
n .2005572043156416 9.8675e-10 deg/d
Q 2.970987858376571 9.7449e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3207  
   data-arc span      38068 days (104.22 yr)  
   first obs. used      1916-10-31  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4328  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:53  

Additional Information
 Earth MOID = 1.81445 au 
 Jupiter MOID = 1.98739 au 
 T_jup = 3.289 
[ 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 10.93   n/a E2021B10 IRAS observations used: 2
diameter diameter 20.78 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 15.310 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Slivan, S.M.; Binzel, R.P.; Boroumand, S.C.; Pan M.W.; et al. (2008) Icarus 195, 226-276.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.1819   0.039 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
B-V BV 0.787   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.17, mean=9.27, max.=12.32) deg.
U-B UB 0.390   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.17, mean=9.27, max.=12.32) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1029 La Plata (A924 HB)          Discovered 1924-Apr-28 by Hartmann, J. at La Plata
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A924 HB = 1938 DR2 = 1969 OU = A916 UL = A916 UR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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