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1496 Turku (1938 SA1)
Classification: Main-belt Asteroid          SPK-ID: 2001496
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1621596760084524 3.3533e-08  
a 2.205656961012146 5.5895e-09 au
q 1.847988342828628 7.5238e-08 au
i 2.501491758961523 3.5629e-06 deg
node 294.3627368110779 8.0189e-05 deg
peri .7601690474745975 8.0974e-05 deg
M 31.57457435240365 1.3367e-05 deg
tp 2458895.560163287592
4.423e-05 TDB
period 1196.479825660457
n .3008826327692405 1.1437e-09 deg/d
Q 2.563325579195663 6.4959e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2781  
   data-arc span      33529 days (91.80 yr)  
   first obs. used      1928-08-17  
   last obs. used      2020-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43975  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:31:58  

Additional Information
 Earth MOID = .831973 au 
 Jupiter MOID = 2.61841 au 
 T_jup = 3.643 
[ 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 12.6   n/a MPO473784  
diameter diameter 7.758 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 6.47 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site,]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.203   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

1496 Turku (1938 SA1)          Discovered 1938-Sep-22 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2133-Jan-17 23:32 00:01 Vesta 0.0444842113183047 0.0444787354701775 0.0444896872578544 3.27677147721055 3.27677066092409 2500139.480572510 1.16377734263487 289.005766825015 19.9873122106481 20.2514359811936 116514.474882969 T 29 CATAB v2.0f-lin.ifort 2020-Jun-23 15:32:17 2020-Jun-23 15:32

Alternate Designations
 1938 SA1 = 1928 QN = 1928 RE = 1950 EC = 1954 MH = 1957 HB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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