Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
1471 Tornio (1938 SL1)
Classification: Main-belt Asteroid          SPK-ID: 2001471
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1184479780738798 3.3337e-08  
a 2.716277504872227 1.0981e-08 au
q 2.394539926532548 9.119e-08 au
i 13.60600708333892 5.2955e-06 deg
node 321.944947687566 1.5919e-05 deg
peri 94.08941889448356 2.8165e-05 deg
M 319.9241216694572 2.2549e-05 deg
tp 2458782.528831413329
(2019-Oct-26.02883141)
0.00010258 TDB
period 1635.157656890485
4.48
9.9158e-06
2.715e-08
d
yr
n .2201622568215213 1.3351e-09 deg/d
Q 3.038015083211905 1.2282e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2275  
   data-arc span      32392 days (88.68 yr)  
   first obs. used      1931-02-18  
   last obs. used      2019-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42588  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:05:09  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin