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JPL Small-Body Database Browser
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4652 Iannini (1975 QO)
Classification: Main-belt Asteroid          SPK-ID: 2004652
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3134470246805459 4.279e-08  
a 2.643455775292429 8.833e-09 au
q 1.814872427652411 1.1446e-07 au
i 11.04684610966552 5.7969e-06 deg
node 327.739762284062 2.0785e-05 deg
peri 51.04322645276115 2.2152e-05 deg
M 19.73376112333224 7.657e-06 deg
tp 2458514.447425785081
3.3189e-05 TDB
period 1569.844011172447
n .229322147575116 1.1494e-09 deg/d
Q 3.472039122932446 1.1602e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1815  
   data-arc span      16167 days (44.26 yr)  
   first obs. used      1975-08-30  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4686  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:47:42  

Additional Information
 Earth MOID = .837233 au 
 Jupiter MOID = 2.11116 au 
 T_jup = 3.297 
[ 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 13.5   n/a MPO448960  
diameter diameter 6.279 km 0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.69 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. (2014) Observatoire de Geneve web site,]
geometric albedo albedo 0.196   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4652 Iannini           Discovered 1975 Aug. 30 at the Felix Aguilar Observatory, El Leoncito.
Named in honor of Gualberto Mario Iannini (b. 1917), Argentinean astronomer who has worked in the field of astrometry for almost 40 years. As a student, Iannini studied the orbit of C/1942 C1 (Whipple-Bernasconi-Kulin). In 1962 he joined the faculty of the School of Mathematics, Astronomy and Physics of the National University of Cordoba and became head of the Department of Astrometry of the Cordoba Observatory, where he finished the reduction of the meridian circle catalogue of the Southern Polar Cap, known as the Cordoba E catalogue.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990202/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1975 QO = 1984 UM2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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