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1752 van Herk (1930 OK)
Classification: Main-belt Asteroid          SPK-ID: 2001752
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2006250869504964 3.4268e-08  
a 2.237939402823271 6.6594e-09 au
q 1.78895261554191 7.6199e-08 au
i 3.506994871839164 3.6353e-06 deg
node 236.8367467522082 6.0373e-05 deg
peri 98.95115316746907 6.1037e-05 deg
M 161.1901620348075 1.0104e-05 deg
tp 2458052.971232442179
(2017-Oct-26.47123244)
3.3685e-05 TDB
period 1222.843589413672
3.35
5.4582e-06
1.494e-08
d
yr
n .2943957862776321 1.314e-09 deg/d
Q 2.686926190104632 7.9954e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2458  
   data-arc span      32436 days (88.80 yr)  
   first obs. used      1930-07-22  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4369  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:26:56  

Additional Information
 Earth MOID = .782642 au 
 Jupiter MOID = 2.6966 au 
 T_jup = 3.608 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO319104  
diameter diameter 4.579 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 88.450 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.307   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

1752 van Herk           Discovered 1930 July 22 by H. van Gent at Johannesburg.
Named in honor of G. van Herk, former staff member of the Leiden Observatory and a well-known authority on astrometry. Name proposed by the Leiden Observatory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5357Last Updated: 2006-03-21

Alternate Designations
 1930 OK = 1937 UK = 1947 UA = 1964 WL1 = 1967 RH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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