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1471 Tornio (1938 SL1)
Classification: Main-belt Asteroid          SPK-ID: 2001471
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184479778656548 3.3348e-08  
a 2.716277503773761 1.1486e-08 au
q 2.394539926129791 9.1216e-08 au
i 13.6060061138232 5.6115e-06 deg
node 321.9449478144896 1.5923e-05 deg
peri 94.08941626810102 2.9174e-05 deg
M 319.9241246319622 2.4241e-05 deg
tp 2458782.528817846903
(2019-Oct-26.02881785)
0.00011037 TDB
period 1635.157655898596
4.48
1.0371e-05
2.839e-08
d
yr
n .220162256955072 1.3964e-09 deg/d
Q 3.038015081417732 1.2846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2139  
   data-arc span      32327 days (88.51 yr)  
   first obs. used      1931-02-18  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43683  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:17:57  

Additional Information
 Earth MOID = 1.45236 au 
 Jupiter MOID = 2.3109 au 
 T_jup = 3.310 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.0   n/a MPO416721  
diameter diameter 28.719 km 0.399 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.60 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2002) Minor Planet Bull. 29, 34.]
geometric albedo albedo 0.085   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B T   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)

1471 Tornio (1938 SL1)          Discovered 1938-Sep-16 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 SL1 = 1931 BA = 1949 EK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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