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4230 van den Bergh (1973 ST1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2004230
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1337488539131417 2.1858e-08  
a 3.944306203210589 2.5142e-08 au
q 3.416759769048678 8.5926e-08 au
i 3.101091098706935 6.4421e-07 deg
node 160.438330910282 4.6011e-06 deg
peri 20.00517030347538 8.0889e-06 deg
M 216.9628969578213 5.97e-06 deg
tp 2460533.343192891893
(2024-Aug-10.84319289)
5.2011e-05 TDB
period 2861.240480523421
7.83
2.7357e-05
7.49e-08
d
yr
n .1258195535994037 1.203e-09 deg/d
Q 4.471852637372502 2.8504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2388  
   data-arc span      25279 days (69.21 yr)  
   first obs. used      1951-11-28  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45776  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:19:15  

Additional Information
 Earth MOID = 2.4211 au 
 Jupiter MOID = .48506 au 
 T_jup = 3.042 
[ 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 11.84   n/a MPCxxxxx  
diameter diameter 28.461 km 0.562 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 87.918 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.050   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

4230 van den Bergh (1973 ST1)          Discovered 1973-Sep-19 by van Houten and Gehrels at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1973 ST1 = 1978 JB2 = 1979 OD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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