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4230 van den Bergh (1973 ST1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2004230
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .133725820284572 5.4682e-08  
a 3.953753538274839 5.4419e-08 au
q 3.425034603166007 2.2754e-07 au
i 3.099514413305159 5.681e-06 deg
node 160.5335931051297 0.00010686 deg
peri 22.90515697657901 0.00010909 deg
M 323.5308930280984 2.5316e-05 deg
tp 2457691.394456601648
(2016-Oct-29.89445660)
0.00020486 JED
period 2871.526425291364
7.86
5.9286e-05
1.623e-07
d
yr
n .1253688619506512 2.5884e-09 deg/d
Q 4.48247247338367 6.1697e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1286  
   data-arc span      23398 days (64.06 yr)  
   first obs. used      1951-11-28  
   last obs. used      2015-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45747  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:51:31  

Additional Information
 Earth MOID = 2.42774 au 
 Jupiter MOID = .477233 au 
 T_jup = 3.041 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8 mag n/a MPO358671  
diameter diameter 37.75 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 88.0 h n/a LCDB (Rev. 2015-December); 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 0.0259   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3

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

[ show close-approach data ]
Alternate Designations
 1973 ST1 = 1978 JB2 = 1979 OD 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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