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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329498937539774 5.5368e-08  
a 3.947150733241017 6.0975e-08 AU
q 3.42237746262569 2.2724e-07 AU
i 3.098404725408998 5.7657e-06 deg
node 160.5575275670187 0.00010974 deg
peri 23.4648581495757 0.00011215 deg
M 272.707778317495 2.665e-05 deg
tp 2457695.039644209731
(2016-Nov-02.53964421)
0.00022095 JED
period 2864.336215715936
7.84
6.6372e-05
1.817e-07
d
yr
n .1256835695561034 2.9123e-09 deg/d
Q 4.471924003856345 6.9082e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1188  
   data-arc span      23127 days (63.32 yr)  
   first obs. used      1951-11-28  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46012  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:46:52  

Additional Information
 Earth MOID = 2.42612 AU 
 T_jup = 3.042 
[ 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 11.70 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
diameter diameter 37.75 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 87.9 h n/a LCDB (Rev. 2015-July); 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., in press.]
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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