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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1590718846093866 3.5812e-08  
a 3.15252675192559 1.9341e-08 au
q 2.651048380215278 1.1212e-07 au
i 10.09890788257168 4.51e-06 deg
node 246.3863645764333 2.5339e-05 deg
peri 197.8491716474747 2.935e-05 deg
M 107.885831415032 1.5266e-05 deg
tp 2458387.799111918209
(2018-Sep-26.29911192)
8.5132e-05 TDB
period 2044.497565773144
5.60
1.8815e-05
5.151e-08
d
yr
n .1760823813276897 1.6204e-09 deg/d
Q 3.654005123635902 2.2417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1792  
   data-arc span      25396 days (69.53 yr)  
   first obs. used      1950-10-17  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46615  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:45:51  

Additional Information
 Earth MOID = 1.66898 au 
 Jupiter MOID = 1.62705 au 
 T_jup = 3.164 
[ 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-August); 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1937-Dec-05 01:09 00:03 Jupiter 1.77728046030983 1.77727933478569 1.77728158584559 2.44681756278746 2.24360183974927 2428872.547920763 2.6825729378614 315.948349908246 35.9354296447061 79.3012264213033 3033493.1714659 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
1948-Jul-31 11:10 00:02 Jupiter 1.66233606356613 1.66233568662214 1.66233644051012 3.03690219748735 2.86421019002867 2432763.965477708 1.9149998203693 187.259110408866 16.9964967125244 89.6245831525817 2728957.5357729 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
1959-Apr-27 10:53 00:02 Jupiter 1.87197085120319 1.87196997690134 1.87197172550793 3.37639524917017 3.23961297108009 2436685.953578851 1.54681193933946 142.757085157044 17.6938971063209 74.5027405672868 2884213.90825415 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
2044-Nov-17 12:07 00:01 Jupiter 1.79516200079647 1.7951613953975 1.79516260619596 2.23862479187537 2.01687095485488 2467937.004941456 1.06621934340356 193.972126729616 31.0244079723786 83.7804839510914 2991698.08757335 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
2055-Jul-01 12:21 00:01 Jupiter 1.66650688558034 1.66650645871398 1.6665073124469 2.93043311062815 2.75152934639342 2471815.014702837 1.28334624546639 143.67258271632 17.7192758726816 88.1181377891987 2482088.08489339 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
2066-Mar-24 14:38 00:02 Jupiter 1.85106742946088 1.85106638067808 1.85106847824737 3.40412406128631 3.26693872786214 2475734.109733700 1.65435583917148 157.290684673557 18.1915290760436 73.2323450622667 2756011.56766722 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
2151-Nov-04 09:33 00:05 Jupiter 1.80336708217988 1.80336554190567 1.80336862251079 2.05259193255803 1.80935201557929 2507003.898031328 4.95929877415849 598.119419893805 32.069320885157 83.6952745134201 2550353.57112444 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
2162-Jun-03 15:29 00:05 Jupiter 1.66772126134548 1.66772083313532 1.66772168955612 2.77964116586758 2.59048658294715 2510868.145463724 4.54717643820766 308.290720867644 23.5993861826046 -85.9996723866458 1871562.84983686 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46
2173-Feb-22 22:22 00:05 Jupiter 1.82688842324111 1.82688596098446 1.82689088553391 3.39611010671487 3.25672834509504 2514785.431670101 4.77302992028151 438.8441991523 17.6988969228688 75.4148332941787 2719187.86705185 T 28 CATAB v2.0f-lin.ifort 2020-May-20 04:46:07 2020-May-20 04:46

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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