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JPL Small-Body Database Browser
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1613 Smiley (1950 SD)
Classification: Main-belt Asteroid          SPK-ID: 2001613
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 .261742449041437 3.5063e-08  
a 2.733553419181217 8.9947e-09 au
q 2.018066452659131 9.7268e-08 au
i 7.986220514060051 4.9189e-06 deg
node 320.7751483705929 3.0834e-05 deg
peri 126.9496681448298 3.2745e-05 deg
M 86.21561908823615 9.4584e-06 deg
tp 2458605.157754078383
(2019-May-01.65775408)
4.2922e-05 TDB
period 1650.782190476687
4.52
8.1478e-06
2.231e-08
d
yr
n .2180784370444686 1.0764e-09 deg/d
Q 3.449040385703303 1.1349e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2140  
   data-arc span      33211 days (90.93 yr)  
   first obs. used      1929-02-02  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43185  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:08:45  

Additional Information
 Earth MOID = 1.04606 au 
 Jupiter MOID = 1.81786 au 
 T_jup = 3.289 
[ 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 11.7   n/a MPO458844  
diameter diameter 18.224 km 0.446 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 80.61 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
[Molnar, L.A.; Haegert, M.J.; Beaumonts, C.N.; Block, M.J.; et al. (2008) Minor Planet Bull. 35, 9-12.]
geometric albedo albedo 0.068   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B Cgh   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)

1613 Smiley (1950 SD)          Discovered 1950-Sep-16 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1950 SD = 1929 CL = 1941 SR = 1952 DC3 = 1952 FY = 1952 HQ = 1988 CS3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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