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58118 (1981 EX7)
Classification: Main-belt Asteroid          SPK-ID: 2058118
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156853899562688 5.885e-08  
a 2.650004089671826 1.3477e-08 au
q 2.343437333172433 1.5929e-07 au
i 13.4691760782352 6.4243e-06 deg
node 193.061589881566 1.4025e-05 deg
peri 153.7017666022772 2.0458e-05 deg
M 220.8823836577945 1.5758e-05 deg
tp 2459609.402658435036
(2022-Jan-29.90265844)
7.0343e-05 TDB
period 1575.680800175631
4.31
1.202e-05
3.291e-08
d
yr
n .2284726703275645 1.7429e-09 deg/d
Q 2.956570846171218 1.5036e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1059  
   data-arc span      14358 days (39.31 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53209  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:52:17  

Additional Information
 Earth MOID = 1.34554 au 
 Jupiter MOID = 2.52547 au 
 T_jup = 3.342 
[ 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 15.0   n/a MPO365923  
diameter diameter 2.916 km 0.612 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.665 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.274   0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58118 (1981 EX7)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EX7 = 2000 RU33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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