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9279 Seager (1981 EY12)
Classification: Main-belt Asteroid          SPK-ID: 2009279
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18566925203072 3.4864e-08  
a 2.455560460450857 8.4994e-09 au
q 1.999638386442736 8.4629e-08 au
i 8.309239327374732 4.2495e-06 deg
node 209.4789201201341 2.5805e-05 deg
peri 261.2300019408332 2.8024e-05 deg
M 227.4845231804747 1.2197e-05 deg
tp 2459913.854793430762
4.8637e-05 TDB
period 1405.479043694856
n .2561404252984079 1.3299e-09 deg/d
Q 2.911482534458978 1.0078e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1832  
   data-arc span      15300 days (41.89 yr)  
   first obs. used      1979-09-18  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48037  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 19:55:29  

Additional Information
 Earth MOID = 1.03624 au 
 Jupiter MOID = 2.28134 au 
 T_jup = 3.455 
[ 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 14.42   n/a MPO636206  
diameter diameter 3.763 km 0.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 140.739 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.261   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

9279 Seager           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring.
Sara Seager (b. 1971) is a professor of physics and planetary science at the Massachusetts Institute of Technology. An expert and textbook editor in the field of exoplanets, she is also dedicated to innovative small satellite technologies for exoplanet transit and asteroid detections.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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