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JPL Small-Body Database Browser
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9542 Eryan (1983 TU1)
Classification: Main-belt Asteroid          SPK-ID: 2009542
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1169629714008836 3.8353e-08  
a 2.398972064046006 9.4768e-09 au
q 2.118381163127474 9.4358e-08 au
i 8.300404206940959 4.0904e-06 deg
node 48.97166287136643 2.7365e-05 deg
peri 307.5247255055323 3.2422e-05 deg
M 223.7885530228433 1.9799e-05 deg
tp 2459114.008123734185
(2020-Sep-21.50812373)
7.6094e-05 TDB
period 1357.176130544367
3.72
8.042e-06
2.202e-08
d
yr
n .2652566545328225 1.5718e-09 deg/d
Q 2.679562964964537 1.0585e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1891  
   data-arc span      19999 days (54.75 yr)  
   first obs. used      1964-08-08  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47788  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:43:17  

Additional Information
 Earth MOID = 1.12616 au 
 Jupiter MOID = 2.77078 au 
 T_jup = 3.504 
[ 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 13.3   n/a MPO435790  
rotation period rot_per 2.79473 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Incomplete or inconclusive result.
Published Reference List:
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]

9542 Eryan           Discovered 1983 Oct. 12 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Eileen V. Ryan (b. 1960), of New Mexico Highlands University, has contributed to the field of fragmentation studies of minor planets by conducting laboratory impact experiments and developing numerical simulations. Recently, she has helped initiate an observational program to study minor planets of the Vesta family.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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