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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1186940702370201 3.3266e-08  
a 2.71695596386862 9.9717e-09 au
q 2.394469401862307 9.0797e-08 au
i 13.60638063558155 4.4441e-06 deg
node 321.9366123960179 1.5551e-05 deg
peri 94.02622768485861 2.5995e-05 deg
M 48.02642612679042 1.8985e-05 deg
tp 2458782.277214380014
(2019-Oct-25.77721438)
8.6383e-05 TDB
period 1635.770328106344
4.48
9.0053e-06
2.466e-08
d
yr
n .2200797959312267 1.2116e-09 deg/d
Q 3.039442525874933 1.1155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2616  
   data-arc span      32571 days (89.17 yr)  
   first obs. used      1931-02-18  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:25:03  

Additional Information
 Earth MOID = 1.45265 au 
 Jupiter MOID = 2.30934 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 11.1   n/a MPO502167  
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-August); 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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