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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06485967900999205 4.5609e-08  
a 1.523533220032883 3.4266e-09 AU
q 1.424717344420491 6.869e-08 AU
i 20.28035068405251 6.7142e-06 deg
node 245.0622715041512 1.3552e-05 deg
peri 95.47035154261596 6.0038e-05 deg
M 295.6242693906087 5.6227e-05 deg
tp 2457123.327606638209
(2015-Apr-10.82760664)
0.00010736 JED
period 686.8728008394005
1.88
2.3173e-06
6.344e-09
d
yr
n .5241145078973254 1.7682e-09 deg/d
Q 1.622349095645276 3.6488e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      757  
   data-arc span      12550 days (34.36 yr)  
   first obs. used      1979-11-21  
   last obs. used      2014-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45649  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:10:26  

Additional Information
 Earth MOID = .499711 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 6. h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Rivkin, A.S.; Binzel, R.P.; Howell, E.S.; Bus, S.J.; Grier, J.A. (2003) Icarus 165, 349-354.]
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 (675)
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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