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JPL Small-Body Database Browser
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18169 Amaldi (2000 QF)
Classification: Main-belt Asteroid          SPK-ID: 2018169
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1592416861100822 3.8985e-08  
a 3.153753672240982 2.0735e-08 au
q 2.651544619897465 1.2463e-07 au
i 10.09876366982654 4.7435e-06 deg
node 246.3899914474636 2.6214e-05 deg
peri 197.9724842285349 3.0253e-05 deg
M 37.33131207316408 1.5214e-05 deg
tp 2458388.365729857401
(2018-Sep-26.86572986)
8.5958e-05 TDB
period 2045.69121764766
5.60
2.0175e-05
5.524e-08
d
yr
n .1759796380286385 1.7356e-09 deg/d
Q 3.6559627245845 2.4037e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1638  
   data-arc span      25044 days (68.57 yr)  
   first obs. used      1950-10-17  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47099  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:35:10  

Additional Information
 Earth MOID = 1.66944 au 
 Jupiter MOID = 1.62501 au 
 T_jup = 3.163 
[ 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 12.6   n/a MPO344447  
diameter diameter 23.311 km 4.444 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 34.14 h n/a LCDB (Rev. 2019-January); 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:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.033   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18169 Amaldi           Discovered 2000 Aug. 20 by V. S. Casulli at the Colleverde di Guidonia.
The nuclear physicist Edoardo Amaldi (1908-1989) was part of the team of Enrico Fermi and contributed to the completion of the first particle accelerator in Italy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

[ show close-approach data ]
Alternate Designations
 2000 QF = 1950 UA = 1984 WQ = 1998 KR17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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