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18271 (2332 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2018271
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07873671511700202 1.7872e-08  
a 2.462039452740212 8.5837e-09 au
q 2.268186553742986 4.4389e-08 au
i 5.52789799708438 3.019e-07 deg
node 215.8157212609865 7.2824e-06 deg
peri 349.5199474938656 1.532e-05 deg
M 239.1664910349898 1.585e-05 deg
tp 2459674.115411008703
(2022-Apr-04.61541101)
6.3115e-05 TDB
period 1411.045242528754
3.86
7.3792e-06
2.02e-08
d
yr
n .2551300193286778 1.3342e-09 deg/d
Q 2.655892351737438 9.2595e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2034  
   data-arc span      17338 days (47.47 yr)  
   first obs. used      1973-09-24  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4798  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:57  

Additional Information
 Earth MOID = 1.26294 au 
 Jupiter MOID = 2.30683 au 
 T_jup = 3.479 
[ 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 14.09   n/a E2021B10  
diameter diameter 4.322 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.175 h n/a LCDB (Rev. 2020-October); 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.238   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18271 (2332 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2332 T-3 = 1991 FA6 = 1995 HN5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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