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5186 Donalu (1990 SB4)
Classification: Main-belt Asteroid          SPK-ID: 2005186
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08415166685089613 4.5347e-08  
a 2.579033424677519 1.0009e-08 au
q 2.36200346312673 1.1583e-07 au
i 14.87878459538501 5.4536e-06 deg
node 333.7401330227717 1.6721e-05 deg
peri 75.94562090899286 3.7026e-05 deg
M 28.45508244170999 3.0952e-05 deg
tp 2458880.924768496458
(2020-Feb-01.42476850)
0.00013023 TDB
period 1512.808245397171
4.14
8.8062e-06
2.411e-08
d
yr
n .2379680313716734 1.3852e-09 deg/d
Q 2.796063386228307 1.0851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2072  
   data-arc span      22480 days (61.55 yr)  
   first obs. used      1959-03-06  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42069  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:57:38  

Additional Information
 Earth MOID = 1.41705 au 
 Jupiter MOID = 2.48784 au 
 T_jup = 3.374 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.9   n/a MPO347565  
diameter diameter 11.371 km 0.320 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.15 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Casalnuovo, G.B. (2016) Minor Planet Bull. 43, 112-115.]
geometric albedo albedo 0.260   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5186 Donalu (1990 SB4)          Discovered 1990-Sep-22 by Roman, B. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 SB4 = 1948 OB = 1959 ER = 1984 FF2 = 1986 PO4 = A901 DA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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