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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0279227855621225 4.5025e-08  
a 2.889892816048435 1.0111e-08 au
q 2.809198958648397 1.3027e-07 au
i 2.424742090303998 4.7291e-06 deg
node 29.89243035256266 8.4231e-05 deg
peri 141.1836098898958 0.0001038 deg
M 249.6952779145424 6.14e-05 deg
tp 2459550.309999215578
(2021-Dec-01.80999922)
0.00030677 TDB
period 1794.40731072476
4.91
9.4175e-06
2.578e-08
d
yr
n .2006233466885488 1.0529e-09 deg/d
Q 2.970586673448474 1.0394e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2905  
   data-arc span      37898 days (103.76 yr)  
   first obs. used      1916-10-31  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:26:38  

Additional Information
 Earth MOID = 1.81394 au 
 Jupiter MOID = 1.98867 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 10.9   n/a MPO502162 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. 2019-August); 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

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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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