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9250 Chamberlin (4643 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2009250
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2061369973026792 3.1007e-08  
a 3.119757583462364 1.6175e-08 au
q 2.47666012289517 9.5454e-08 au
i 19.35163483490726 3.9373e-06 deg
node 181.2293222519569 1.0385e-05 deg
peri 55.90314116051833 1.4897e-05 deg
M 72.4036502886899 9.2968e-06 deg
tp 2458795.702649050366
(2019-Nov-08.20264905)
5.1648e-05 TDB
period 2012.70303031437
5.51
1.5653e-05
4.286e-08
d
yr
n .1788639429552459 1.391e-09 deg/d
Q 3.762855044029558 1.9509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1696  
   data-arc span      21986 days (60.19 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45231  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:16:09  

Additional Information
 Earth MOID = 1.52103 au 
 Jupiter MOID = 1.41975 au 
 T_jup = 3.098 
[ 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 13.48   n/a MPCxxxxx  
diameter diameter 8.809 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.119   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9250 Chamberlin           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named in honor of Alan B. Chamberlin, a senior engineer within the Navigation and Flight Mechanics Section of NASA's Jet Propulsion Laboratory. Since joining the staff at JPL in 1996, Alan has shown his expertise in astronomical observing and celestial mechanics. His research work has centered on the search for gaseous emissions from suspected defunct comets and the uncertainties associated with the close approaches to the earth of the so-called potentially hazardous objects. For the New Millennium Deep Space One spacecraft that was launched on 1998 Oct. 25, Alan is responsible for the ephemeris development for both the mission targets and the two dozen well-observed minor planets that will be used by this spacecraft to navigate autonomously to its targets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 4643 P-L = 1993 RU19 = 1997 JX7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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