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18259 (4311 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018259
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09899566283678801 3.0383e-08  
a 2.263294464045022 7.9006e-09 au
q 2.039238128382052 6.7596e-08 au
i 3.502397864726461 3.1534e-06 deg
node 138.9447901112529 5.508e-05 deg
peri 116.4604336396374 5.8453e-05 deg
M 55.11300197447135 1.7602e-05 deg
tp 2459010.102349334775
(2020-Jun-09.60234933)
6.116e-05 TDB
period 1243.683918201927
3.41
6.5121e-06
1.783e-08
d
yr
n .289462615646325 1.5157e-09 deg/d
Q 2.487350799707992 8.6827e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1384  
   data-arc span      17125 days (46.89 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-08-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52392  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:50  

Additional Information
 Earth MOID = 1.02558 au 
 Jupiter MOID = 2.54148 au 
 T_jup = 3.609 
[ 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 15.47   n/a E2021B10  
diameter diameter 2.004 km 0.346 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.366   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18259 (4311 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 4311 T-2 = 1990 RS15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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