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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02783560335536532 2.3294e-08  
a 2.890528151604172 9.2218e-09 au
q 2.810068556488601 7.1468e-08 au
i 2.42452189995468 5.111e-07 deg
node 29.88701007537973 6.2095e-06 deg
peri 140.7485222678114 2.7325e-05 deg
M 290.2448459222633 2.8598e-05 deg
tp 2459548.306771906029
(2021-Nov-29.80677191)
0.00014303 TDB
period 1794.99908704428
4.91
8.59e-06
2.352e-08
d
yr
n .2005572050695529 9.5977e-10 deg/d
Q 2.970987746719743 9.4785e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3302  
   data-arc span      38120 days (104.37 yr)  
   first obs. used      1916-10-31  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42847  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:50:50  

Additional Information
 Earth MOID = 1.81445 au 
 Jupiter MOID = 1.98739 au 
 T_jup = 3.289 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456450.5 (2013-Jun-07.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02647441715546396 2.2646e-08  
q 2.814269265374487 6.9532e-08 au
tp 2455984.075693746635
(2012-Feb-26.57569375)
0.000163 TDB
node 29.92773868039843 6.2009e-06 deg
peri 145.8150625505502 3.1716e-05 deg
i 2.427474452245235 5.1137e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3302  
   data-arc span      38120 days (104.37 yr)  
   first obs. used      1916-10-31  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42847  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:50:50  

Additional Information
 Jupiter MOID = 1.98739 au 
 T_jup = 3.289 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.128197468214157E-16 -1.563569109019185E-15 -2.867538244172634E-12 -1.820395069361731E-14 -5.19576954258107E-13 2.416306808161917E-15
q -1.563569109019185E-15 4.834726533199652E-15 8.548324657493451E-12 5.347522250030251E-14 1.555852568960453E-12 -7.166042453193223E-15
tp -2.867538244172634E-12 8.548324657493451E-12 2.656980213309503E-8 -1.487297658907703E-11 5.060401837842876E-9 -2.227089137922801E-12
node -1.820395069361731E-14 5.347522250030251E-14 -1.487297658907703E-11 3.845164825582643E-11 -4.241446282860234E-11 -2.826306478200637E-12
peri -5.19576954258107E-13 1.555852568960453E-12 5.060401837842876E-9 -4.241446282860234E-11 1.005903454621865E-9 2.534615764500685E-12
i 2.416306808161917E-15 -7.166042453193223E-15 -2.227089137922801E-12 -2.826306478200637E-12 2.534615764500685E-12 2.614979043147731E-13

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

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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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