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JPL Small-Body Database Browser
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18987 Irani (2000 RU23)
Classification: Main-belt Asteroid          SPK-ID: 2018987
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1709660696486599 5.0787e-08  
a 2.223601679566617 1.0356e-08 au
q 1.843441239946954 1.1156e-07 au
i 1.365049690865708 4.6525e-06 deg
node 284.2830980534867 0.00022991 deg
peri 100.502053719931 0.00023039 deg
M 204.6165440089064 1.6928e-05 deg
tp 2459123.240552892209
(2020-Sep-30.74055289)
5.9067e-05 TDB
period 1211.110911653181
3.32
8.4612e-06
2.317e-08
d
yr
n .2972477553757613 2.0767e-09 deg/d
Q 2.60376211918628 1.2127e-08 au
  Orbit Determination Parameters
   # obs. used (total)      711  
   data-arc span      10450 days (28.61 yr)  
   first obs. used      1990-09-25  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5701  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:39:17  

Additional Information
 Earth MOID = .847083 au 
 Jupiter MOID = 2.84726 au 
 T_jup = 3.628 
[ 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 16.0   n/a MPO431717  
diameter diameter 3.577 km 0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18987 Irani           Discovered 2000 Sept. 1 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Natasha Rustom Irani (b. 1986) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her computer science project. She attends the Lake Highland Preparatory School, Orlando, Florida, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040830/MPCPages.arcLast Updated: 2004-09-06

Alternate Designations
 2000 RU23 = 1990 UV2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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