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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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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08415166376298239 4.4635e-08  
a 2.579033425158367 9.9472e-09 au
q 2.362003471530947 1.1379e-07 au
i 14.87878540612754 5.3544e-06 deg
node 333.740135544864 1.6369e-05 deg
peri 75.9456190368534 3.6882e-05 deg
M 28.45508163553942 3.088e-05 deg
tp 2458880.924771850743
(2020-Feb-01.42477185)
0.00012993 TDB
period 1512.808245820254
4.14
8.7522e-06
2.396e-08
d
yr
n .2379680313051215 1.3767e-09 deg/d
Q 2.796063378785786 1.0784e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2129  
   data-arc span      22512 days (61.63 yr)  
   first obs. used      1959-03-06  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42047  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:45:28  

Additional Information
 Earth MOID = 1.41705 au 
 Jupiter MOID = 2.48784 au 
 T_jup = 3.374 
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Orbital Elements at Epoch 2456785.5 (2014-May-08.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08372750847574247 4.5116e-08  
q 2.363192406546079 1.1507e-07 au
tp 2457363.201561000183
(2015-Dec-06.70156100)
0.00013259 TDB
node 333.8583747578789 1.634e-05 deg
peri 74.72586367373951 3.6918e-05 deg
i 14.89083670938045 5.3591e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2129  
   data-arc span      22512 days (61.63 yr)  
   first obs. used      1959-03-06  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42047  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:45:28  

Additional Information
 Jupiter MOID = 2.48784 au 
 T_jup = 3.374 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.035422414784139E-15 -5.176118064145084E-15 -3.164461256674074E-12 -3.333801566477388E-15 -8.000456768140497E-13 -7.552545668753072E-15
q -5.176118064145084E-15 1.324222380219984E-14 7.830366826790964E-12 9.103078048263922E-15 1.972632534269563E-12 2.023329677718295E-14
tp -3.164461256674074E-12 7.830366826790964E-12 1.757891569980314E-8 4.720574915924156E-12 4.405513036306935E-9 1.389726021745314E-11
node -3.333801566477388E-15 9.103078048263922E-15 4.720574915924156E-12 2.670063599353666E-10 -2.563521080916027E-10 3.448807567880862E-11
peri -8.000456768140497E-13 1.972632534269563E-12 4.405513036306935E-9 -2.563521080916027E-10 1.36293775444225E-9 -2.994512327346709E-11
i -7.552545668753072E-15 2.023329677718295E-14 1.389726021745314E-11 3.448807567880862E-11 -2.994512327346709E-11 2.87198457215355E-11

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

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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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