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JPL Small-Body Database Browser
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4628 Laplace (1986 RU4)
Classification: Main-belt Asteroid          SPK-ID: 2004628
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1161045368039365 3.9156e-08  
a 2.646282265901488 1.1475e-08 au
q 2.339036889166525 1.0474e-07 au
i 11.8016095283426 4.2206e-06 deg
node 275.601647532714 1.9808e-05 deg
peri 248.9407999564795 2.6159e-05 deg
M 73.27001926422538 1.7724e-05 deg
tp 2458280.480471219225
(2018-Jun-10.98047122)
7.7273e-05 TDB
period 1572.362495847326
4.30
1.0228e-05
2.8e-08
d
yr
n .2289548376731033 1.4893e-09 deg/d
Q 2.953527642636452 1.2808e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2233  
   data-arc span      23013 days (63.01 yr)  
   first obs. used      1956-10-28  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41782  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:38:15  

Additional Information
 Earth MOID = 1.37853 au 
 Jupiter MOID = 2.18703 au 
 T_jup = 3.353 
[ 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 11.1   n/a MPO344337  
diameter diameter 18.719 km 0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.016 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Angeli, C.A.; Barucci, M.A. (1996) Planet. Space Sci. 44, 181-186.]
[Polakis, T. (2018) Minor Planet Bull. 45, 269-273.]
geometric albedo albedo 0.224   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4628 Laplace (1986 RU4)          Discovered 1986-Sep-07 by Elst, E. W. at Rozhen
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1986 RU4 = 1937 JN = 1956 UH = 1976 ME = 1977 TY7 = 1982 UN11 = 1986 VC1 = 1986 WK3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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