Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1159754319829306 1.7669e-08  
a 2.398810659202498 6.4828e-09 au
q 2.120607556756229 4.2754e-08 au
i 8.29532437407622 7.1349e-07 deg
node 48.93495924548767 4.7597e-06 deg
peri 307.4437307524512 5.9807e-06 deg
M 22.96437406303187 5.655e-06 deg
tp 2459113.934569439684
(2020-Sep-21.43456944)
2.1334e-05 TDB
period 1357.039164933351
3.72
5.5011e-06
1.506e-08
d
yr
n .2652834268181795 1.0754e-09 deg/d
Q 2.677013761648766 7.2347e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2787  
   data-arc span      20678 days (56.61 yr)  
   first obs. used      1964-08-08  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43332  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:19:04  

Additional Information
 Earth MOID = 1.1276 au 
 Jupiter MOID = 2.77062 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 13.46   n/a MPCxxxxx  
rotation period rot_per 2.79473 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-19 01:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin