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5261 Eureka (1990 MB)
Classification: Mars-crossing Asteroid          SPK-ID: 2005261
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06475604970208296 4.52e-08  
a 1.523541739310513 3.3225e-09 au
q 1.424883194716523 6.8056e-08 au
i 20.28092314043808 6.0813e-06 deg
node 245.0471738926641 1.3309e-05 deg
peri 95.53828684222017 5.2142e-05 deg
M 250.030792270069 5.0367e-05 deg
tp 2457810.320809119477
(2017-Feb-25.82080912)
9.6365e-05 JED
period 686.8785621200111
1.88
2.2469e-06
6.152e-09
d
yr
n .5241101118207573 1.7144e-09 deg/d
Q 1.622200283904502 3.5376e-09 au
  Orbit Determination Parameters
   # obs. used (total)      858  
   data-arc span      13267 days (36.32 yr)  
   first obs. used      1979-11-21  
   last obs. used      2016-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46311  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:48:14  

Additional Information
 Earth MOID = .498235 au 
 Jupiter MOID = 3.52275 au 
 T_jup = 4.428 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1 mag n/a PDS3 (MPC 28113)  
rotation period rot_per 2.6902 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Koehn, B.W.; Bowell, E.L.G.; Skiff, B.A.; Sanborn, J.J.; et al. (2014) Minor Planet Bul. 41, 286-300.]
SMASSII spectral type spec_B Sr   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

5261 Eureka (1990 MB)          Discovered 1990-Jun-20 by Holt and Levy at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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